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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
26 | #include <linux/proc_fs.h> | |
72c2d582 | 27 | #include <linux/security.h> |
1da177e4 | 28 | #include <linux/ctype.h> |
dfec072e | 29 | #include <linux/kmemcheck.h> |
62239ac2 | 30 | #include <linux/fs.h> |
1da177e4 LT |
31 | #include <linux/init.h> |
32 | #include <linux/kernel.h> | |
0296b228 | 33 | #include <linux/kobject.h> |
20380731 | 34 | #include <linux/net.h> |
1da177e4 LT |
35 | #include <linux/sysrq.h> |
36 | #include <linux/highuid.h> | |
37 | #include <linux/writeback.h> | |
38 | #include <linux/hugetlb.h> | |
1da177e4 | 39 | #include <linux/initrd.h> |
0b77f5bf | 40 | #include <linux/key.h> |
1da177e4 LT |
41 | #include <linux/times.h> |
42 | #include <linux/limits.h> | |
43 | #include <linux/dcache.h> | |
44 | #include <linux/syscalls.h> | |
c748e134 | 45 | #include <linux/vmstat.h> |
c255d844 PM |
46 | #include <linux/nfs_fs.h> |
47 | #include <linux/acpi.h> | |
10a0a8d4 | 48 | #include <linux/reboot.h> |
b0fc494f | 49 | #include <linux/ftrace.h> |
12e22c5e | 50 | #include <linux/slow-work.h> |
cdd6c482 | 51 | #include <linux/perf_event.h> |
1da177e4 LT |
52 | |
53 | #include <asm/uaccess.h> | |
54 | #include <asm/processor.h> | |
55 | ||
29cbc78b AK |
56 | #ifdef CONFIG_X86 |
57 | #include <asm/nmi.h> | |
0741f4d2 | 58 | #include <asm/stacktrace.h> |
6e7c4025 | 59 | #include <asm/io.h> |
29cbc78b AK |
60 | #endif |
61 | ||
7058cb02 | 62 | |
1da177e4 LT |
63 | #if defined(CONFIG_SYSCTL) |
64 | ||
65 | /* External variables not in a header file. */ | |
66 | extern int C_A_D; | |
45807a1d | 67 | extern int print_fatal_signals; |
1da177e4 LT |
68 | extern int sysctl_overcommit_memory; |
69 | extern int sysctl_overcommit_ratio; | |
fadd8fbd | 70 | extern int sysctl_panic_on_oom; |
fe071d7e | 71 | extern int sysctl_oom_kill_allocating_task; |
fef1bdd6 | 72 | extern int sysctl_oom_dump_tasks; |
1da177e4 | 73 | extern int max_threads; |
1da177e4 | 74 | extern int core_uses_pid; |
d6e71144 | 75 | extern int suid_dumpable; |
1da177e4 | 76 | extern char core_pattern[]; |
a293980c | 77 | extern unsigned int core_pipe_limit; |
1da177e4 LT |
78 | extern int pid_max; |
79 | extern int min_free_kbytes; | |
1da177e4 | 80 | extern int pid_max_min, pid_max_max; |
9d0243bc | 81 | extern int sysctl_drop_caches; |
8ad4b1fb | 82 | extern int percpu_pagelist_fraction; |
bebfa101 | 83 | extern int compat_log; |
9745512c | 84 | extern int latencytop_enabled; |
eceea0b3 | 85 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
86 | #ifndef CONFIG_MMU |
87 | extern int sysctl_nr_trim_pages; | |
88 | #endif | |
31a72bce PM |
89 | #ifdef CONFIG_RCU_TORTURE_TEST |
90 | extern int rcutorture_runnable; | |
91 | #endif /* #ifdef CONFIG_RCU_TORTURE_TEST */ | |
cb684b5b | 92 | #ifdef CONFIG_BLOCK |
5e605b64 | 93 | extern int blk_iopoll_enabled; |
cb684b5b | 94 | #endif |
1da177e4 | 95 | |
c4f3b63f | 96 | /* Constants used for minimum and maximum */ |
195cf453 | 97 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
c4f3b63f | 98 | static int sixty = 60; |
9383d967 | 99 | static int neg_one = -1; |
c4f3b63f RT |
100 | #endif |
101 | ||
c4f3b63f | 102 | static int zero; |
cd5f9a4c LT |
103 | static int __maybe_unused one = 1; |
104 | static int __maybe_unused two = 2; | |
fc3501d4 | 105 | static unsigned long one_ul = 1; |
c4f3b63f | 106 | static int one_hundred = 100; |
af91322e DY |
107 | #ifdef CONFIG_PRINTK |
108 | static int ten_thousand = 10000; | |
109 | #endif | |
c4f3b63f | 110 | |
9e4a5bda AR |
111 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
112 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
113 | ||
1da177e4 LT |
114 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
115 | static int maxolduid = 65535; | |
116 | static int minolduid; | |
8ad4b1fb | 117 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
118 | |
119 | static int ngroups_max = NGROUPS_MAX; | |
120 | ||
a1ef5adb | 121 | #ifdef CONFIG_MODULES |
1da177e4 | 122 | extern char modprobe_path[]; |
3d43321b | 123 | extern int modules_disabled; |
1da177e4 | 124 | #endif |
1da177e4 LT |
125 | #ifdef CONFIG_CHR_DEV_SG |
126 | extern int sg_big_buff; | |
127 | #endif | |
1da177e4 | 128 | |
72c57ed5 | 129 | #ifdef CONFIG_SPARC |
17f04fbb | 130 | #include <asm/system.h> |
1da177e4 LT |
131 | #endif |
132 | ||
0871420f DM |
133 | #ifdef CONFIG_SPARC64 |
134 | extern int sysctl_tsb_ratio; | |
135 | #endif | |
136 | ||
1da177e4 LT |
137 | #ifdef __hppa__ |
138 | extern int pwrsw_enabled; | |
139 | extern int unaligned_enabled; | |
140 | #endif | |
141 | ||
347a8dc3 | 142 | #ifdef CONFIG_S390 |
1da177e4 LT |
143 | #ifdef CONFIG_MATHEMU |
144 | extern int sysctl_ieee_emulation_warnings; | |
145 | #endif | |
146 | extern int sysctl_userprocess_debug; | |
951f22d5 | 147 | extern int spin_retry; |
1da177e4 LT |
148 | #endif |
149 | ||
1da177e4 LT |
150 | #ifdef CONFIG_BSD_PROCESS_ACCT |
151 | extern int acct_parm[]; | |
152 | #endif | |
153 | ||
d2b176ed JS |
154 | #ifdef CONFIG_IA64 |
155 | extern int no_unaligned_warning; | |
88fc241f | 156 | extern int unaligned_dump_stack; |
d2b176ed JS |
157 | #endif |
158 | ||
23f78d4a IM |
159 | #ifdef CONFIG_RT_MUTEXES |
160 | extern int max_lock_depth; | |
161 | #endif | |
162 | ||
d6f8ff73 | 163 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 164 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 165 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 166 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 167 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 168 | #endif |
9ec52099 | 169 | |
d8217f07 | 170 | static struct ctl_table root_table[]; |
e51b6ba0 EB |
171 | static struct ctl_table_root sysctl_table_root; |
172 | static struct ctl_table_header root_table_header = { | |
b380b0d4 | 173 | .count = 1, |
e51b6ba0 | 174 | .ctl_table = root_table, |
73455092 | 175 | .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), |
e51b6ba0 | 176 | .root = &sysctl_table_root, |
73455092 | 177 | .set = &sysctl_table_root.default_set, |
e51b6ba0 EB |
178 | }; |
179 | static struct ctl_table_root sysctl_table_root = { | |
180 | .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), | |
73455092 | 181 | .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), |
e51b6ba0 | 182 | }; |
1da177e4 | 183 | |
d8217f07 EB |
184 | static struct ctl_table kern_table[]; |
185 | static struct ctl_table vm_table[]; | |
186 | static struct ctl_table fs_table[]; | |
187 | static struct ctl_table debug_table[]; | |
188 | static struct ctl_table dev_table[]; | |
189 | extern struct ctl_table random_table[]; | |
2d9048e2 | 190 | #ifdef CONFIG_INOTIFY_USER |
d8217f07 | 191 | extern struct ctl_table inotify_table[]; |
0399cb08 | 192 | #endif |
7ef9964e DL |
193 | #ifdef CONFIG_EPOLL |
194 | extern struct ctl_table epoll_table[]; | |
195 | #endif | |
1da177e4 LT |
196 | |
197 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
198 | int sysctl_legacy_va_layout; | |
199 | #endif | |
200 | ||
f20786ff PZ |
201 | extern int prove_locking; |
202 | extern int lock_stat; | |
9bc9a6bd | 203 | |
1da177e4 LT |
204 | /* The default sysctl tables: */ |
205 | ||
d8217f07 | 206 | static struct ctl_table root_table[] = { |
1da177e4 LT |
207 | { |
208 | .ctl_name = CTL_KERN, | |
209 | .procname = "kernel", | |
210 | .mode = 0555, | |
211 | .child = kern_table, | |
212 | }, | |
213 | { | |
214 | .ctl_name = CTL_VM, | |
215 | .procname = "vm", | |
216 | .mode = 0555, | |
217 | .child = vm_table, | |
218 | }, | |
1da177e4 LT |
219 | { |
220 | .ctl_name = CTL_FS, | |
221 | .procname = "fs", | |
222 | .mode = 0555, | |
223 | .child = fs_table, | |
224 | }, | |
225 | { | |
226 | .ctl_name = CTL_DEBUG, | |
227 | .procname = "debug", | |
228 | .mode = 0555, | |
229 | .child = debug_table, | |
230 | }, | |
231 | { | |
232 | .ctl_name = CTL_DEV, | |
233 | .procname = "dev", | |
234 | .mode = 0555, | |
235 | .child = dev_table, | |
236 | }, | |
2be7fe07 AM |
237 | /* |
238 | * NOTE: do not add new entries to this table unless you have read | |
239 | * Documentation/sysctl/ctl_unnumbered.txt | |
240 | */ | |
1da177e4 LT |
241 | { .ctl_name = 0 } |
242 | }; | |
243 | ||
77e54a1f | 244 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
245 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
246 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
247 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
248 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
77e54a1f IM |
249 | #endif |
250 | ||
d8217f07 | 251 | static struct ctl_table kern_table[] = { |
2bba22c5 MG |
252 | { |
253 | .ctl_name = CTL_UNNUMBERED, | |
254 | .procname = "sched_child_runs_first", | |
255 | .data = &sysctl_sched_child_runs_first, | |
256 | .maxlen = sizeof(unsigned int), | |
257 | .mode = 0644, | |
258 | .proc_handler = &proc_dointvec, | |
259 | }, | |
77e54a1f IM |
260 | #ifdef CONFIG_SCHED_DEBUG |
261 | { | |
262 | .ctl_name = CTL_UNNUMBERED, | |
b2be5e96 PZ |
263 | .procname = "sched_min_granularity_ns", |
264 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
265 | .maxlen = sizeof(unsigned int), |
266 | .mode = 0644, | |
b2be5e96 PZ |
267 | .proc_handler = &sched_nr_latency_handler, |
268 | .strategy = &sysctl_intvec, | |
269 | .extra1 = &min_sched_granularity_ns, | |
270 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 271 | }, |
21805085 PZ |
272 | { |
273 | .ctl_name = CTL_UNNUMBERED, | |
274 | .procname = "sched_latency_ns", | |
275 | .data = &sysctl_sched_latency, | |
276 | .maxlen = sizeof(unsigned int), | |
277 | .mode = 0644, | |
b2be5e96 | 278 | .proc_handler = &sched_nr_latency_handler, |
21805085 PZ |
279 | .strategy = &sysctl_intvec, |
280 | .extra1 = &min_sched_granularity_ns, | |
281 | .extra2 = &max_sched_granularity_ns, | |
282 | }, | |
77e54a1f IM |
283 | { |
284 | .ctl_name = CTL_UNNUMBERED, | |
285 | .procname = "sched_wakeup_granularity_ns", | |
286 | .data = &sysctl_sched_wakeup_granularity, | |
287 | .maxlen = sizeof(unsigned int), | |
288 | .mode = 0644, | |
289 | .proc_handler = &proc_dointvec_minmax, | |
290 | .strategy = &sysctl_intvec, | |
77e54a1f IM |
291 | .extra1 = &min_wakeup_granularity_ns, |
292 | .extra2 = &max_wakeup_granularity_ns, | |
293 | }, | |
2398f2c6 PZ |
294 | { |
295 | .ctl_name = CTL_UNNUMBERED, | |
296 | .procname = "sched_shares_ratelimit", | |
297 | .data = &sysctl_sched_shares_ratelimit, | |
298 | .maxlen = sizeof(unsigned int), | |
299 | .mode = 0644, | |
300 | .proc_handler = &proc_dointvec, | |
301 | }, | |
ffda12a1 PZ |
302 | { |
303 | .ctl_name = CTL_UNNUMBERED, | |
304 | .procname = "sched_shares_thresh", | |
305 | .data = &sysctl_sched_shares_thresh, | |
306 | .maxlen = sizeof(unsigned int), | |
307 | .mode = 0644, | |
308 | .proc_handler = &proc_dointvec_minmax, | |
309 | .strategy = &sysctl_intvec, | |
310 | .extra1 = &zero, | |
311 | }, | |
1fc84aaa PZ |
312 | { |
313 | .ctl_name = CTL_UNNUMBERED, | |
314 | .procname = "sched_features", | |
315 | .data = &sysctl_sched_features, | |
316 | .maxlen = sizeof(unsigned int), | |
317 | .mode = 0644, | |
318 | .proc_handler = &proc_dointvec, | |
319 | }, | |
da84d961 IM |
320 | { |
321 | .ctl_name = CTL_UNNUMBERED, | |
322 | .procname = "sched_migration_cost", | |
323 | .data = &sysctl_sched_migration_cost, | |
324 | .maxlen = sizeof(unsigned int), | |
325 | .mode = 0644, | |
326 | .proc_handler = &proc_dointvec, | |
327 | }, | |
b82d9fdd PZ |
328 | { |
329 | .ctl_name = CTL_UNNUMBERED, | |
330 | .procname = "sched_nr_migrate", | |
331 | .data = &sysctl_sched_nr_migrate, | |
332 | .maxlen = sizeof(unsigned int), | |
fa85ae24 PZ |
333 | .mode = 0644, |
334 | .proc_handler = &proc_dointvec, | |
335 | }, | |
e9e9250b PZ |
336 | { |
337 | .ctl_name = CTL_UNNUMBERED, | |
338 | .procname = "sched_time_avg", | |
339 | .data = &sysctl_sched_time_avg, | |
340 | .maxlen = sizeof(unsigned int), | |
341 | .mode = 0644, | |
342 | .proc_handler = &proc_dointvec, | |
343 | }, | |
cd1bb94b AB |
344 | { |
345 | .ctl_name = CTL_UNNUMBERED, | |
346 | .procname = "timer_migration", | |
347 | .data = &sysctl_timer_migration, | |
348 | .maxlen = sizeof(unsigned int), | |
349 | .mode = 0644, | |
bfdb4d9f AB |
350 | .proc_handler = &proc_dointvec_minmax, |
351 | .strategy = &sysctl_intvec, | |
352 | .extra1 = &zero, | |
353 | .extra2 = &one, | |
fa85ae24 | 354 | }, |
1fc84aaa | 355 | #endif |
9f0c1e56 PZ |
356 | { |
357 | .ctl_name = CTL_UNNUMBERED, | |
358 | .procname = "sched_rt_period_us", | |
359 | .data = &sysctl_sched_rt_period, | |
360 | .maxlen = sizeof(unsigned int), | |
361 | .mode = 0644, | |
d0b27fa7 | 362 | .proc_handler = &sched_rt_handler, |
9f0c1e56 PZ |
363 | }, |
364 | { | |
365 | .ctl_name = CTL_UNNUMBERED, | |
366 | .procname = "sched_rt_runtime_us", | |
367 | .data = &sysctl_sched_rt_runtime, | |
368 | .maxlen = sizeof(int), | |
369 | .mode = 0644, | |
d0b27fa7 | 370 | .proc_handler = &sched_rt_handler, |
9f0c1e56 | 371 | }, |
1799e35d IM |
372 | { |
373 | .ctl_name = CTL_UNNUMBERED, | |
374 | .procname = "sched_compat_yield", | |
375 | .data = &sysctl_sched_compat_yield, | |
376 | .maxlen = sizeof(unsigned int), | |
377 | .mode = 0644, | |
378 | .proc_handler = &proc_dointvec, | |
379 | }, | |
f20786ff PZ |
380 | #ifdef CONFIG_PROVE_LOCKING |
381 | { | |
382 | .ctl_name = CTL_UNNUMBERED, | |
383 | .procname = "prove_locking", | |
384 | .data = &prove_locking, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
387 | .proc_handler = &proc_dointvec, | |
388 | }, | |
389 | #endif | |
390 | #ifdef CONFIG_LOCK_STAT | |
391 | { | |
392 | .ctl_name = CTL_UNNUMBERED, | |
393 | .procname = "lock_stat", | |
394 | .data = &lock_stat, | |
395 | .maxlen = sizeof(int), | |
396 | .mode = 0644, | |
397 | .proc_handler = &proc_dointvec, | |
398 | }, | |
77e54a1f | 399 | #endif |
1da177e4 LT |
400 | { |
401 | .ctl_name = KERN_PANIC, | |
402 | .procname = "panic", | |
403 | .data = &panic_timeout, | |
404 | .maxlen = sizeof(int), | |
405 | .mode = 0644, | |
406 | .proc_handler = &proc_dointvec, | |
407 | }, | |
408 | { | |
409 | .ctl_name = KERN_CORE_USES_PID, | |
410 | .procname = "core_uses_pid", | |
411 | .data = &core_uses_pid, | |
412 | .maxlen = sizeof(int), | |
413 | .mode = 0644, | |
414 | .proc_handler = &proc_dointvec, | |
415 | }, | |
416 | { | |
417 | .ctl_name = KERN_CORE_PATTERN, | |
418 | .procname = "core_pattern", | |
419 | .data = core_pattern, | |
71ce92f3 | 420 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 LT |
421 | .mode = 0644, |
422 | .proc_handler = &proc_dostring, | |
423 | .strategy = &sysctl_string, | |
424 | }, | |
a293980c NH |
425 | { |
426 | .ctl_name = CTL_UNNUMBERED, | |
427 | .procname = "core_pipe_limit", | |
428 | .data = &core_pipe_limit, | |
429 | .maxlen = sizeof(unsigned int), | |
430 | .mode = 0644, | |
431 | .proc_handler = &proc_dointvec, | |
432 | }, | |
34f5a398 | 433 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 434 | { |
1da177e4 | 435 | .procname = "tainted", |
25ddbb18 | 436 | .maxlen = sizeof(long), |
34f5a398 | 437 | .mode = 0644, |
25ddbb18 | 438 | .proc_handler = &proc_taint, |
1da177e4 | 439 | }, |
34f5a398 | 440 | #endif |
9745512c AV |
441 | #ifdef CONFIG_LATENCYTOP |
442 | { | |
443 | .procname = "latencytop", | |
444 | .data = &latencytop_enabled, | |
445 | .maxlen = sizeof(int), | |
446 | .mode = 0644, | |
447 | .proc_handler = &proc_dointvec, | |
448 | }, | |
449 | #endif | |
1da177e4 LT |
450 | #ifdef CONFIG_BLK_DEV_INITRD |
451 | { | |
452 | .ctl_name = KERN_REALROOTDEV, | |
453 | .procname = "real-root-dev", | |
454 | .data = &real_root_dev, | |
455 | .maxlen = sizeof(int), | |
456 | .mode = 0644, | |
457 | .proc_handler = &proc_dointvec, | |
458 | }, | |
459 | #endif | |
45807a1d IM |
460 | { |
461 | .ctl_name = CTL_UNNUMBERED, | |
462 | .procname = "print-fatal-signals", | |
463 | .data = &print_fatal_signals, | |
464 | .maxlen = sizeof(int), | |
465 | .mode = 0644, | |
466 | .proc_handler = &proc_dointvec, | |
467 | }, | |
72c57ed5 | 468 | #ifdef CONFIG_SPARC |
1da177e4 LT |
469 | { |
470 | .ctl_name = KERN_SPARC_REBOOT, | |
471 | .procname = "reboot-cmd", | |
472 | .data = reboot_command, | |
473 | .maxlen = 256, | |
474 | .mode = 0644, | |
475 | .proc_handler = &proc_dostring, | |
476 | .strategy = &sysctl_string, | |
477 | }, | |
478 | { | |
479 | .ctl_name = KERN_SPARC_STOP_A, | |
480 | .procname = "stop-a", | |
481 | .data = &stop_a_enabled, | |
482 | .maxlen = sizeof (int), | |
483 | .mode = 0644, | |
484 | .proc_handler = &proc_dointvec, | |
485 | }, | |
486 | { | |
487 | .ctl_name = KERN_SPARC_SCONS_PWROFF, | |
488 | .procname = "scons-poweroff", | |
489 | .data = &scons_pwroff, | |
490 | .maxlen = sizeof (int), | |
491 | .mode = 0644, | |
492 | .proc_handler = &proc_dointvec, | |
493 | }, | |
494 | #endif | |
0871420f DM |
495 | #ifdef CONFIG_SPARC64 |
496 | { | |
497 | .ctl_name = CTL_UNNUMBERED, | |
498 | .procname = "tsb-ratio", | |
499 | .data = &sysctl_tsb_ratio, | |
500 | .maxlen = sizeof (int), | |
501 | .mode = 0644, | |
502 | .proc_handler = &proc_dointvec, | |
503 | }, | |
504 | #endif | |
1da177e4 LT |
505 | #ifdef __hppa__ |
506 | { | |
507 | .ctl_name = KERN_HPPA_PWRSW, | |
508 | .procname = "soft-power", | |
509 | .data = &pwrsw_enabled, | |
510 | .maxlen = sizeof (int), | |
511 | .mode = 0644, | |
512 | .proc_handler = &proc_dointvec, | |
513 | }, | |
514 | { | |
515 | .ctl_name = KERN_HPPA_UNALIGNED, | |
516 | .procname = "unaligned-trap", | |
517 | .data = &unaligned_enabled, | |
518 | .maxlen = sizeof (int), | |
519 | .mode = 0644, | |
520 | .proc_handler = &proc_dointvec, | |
521 | }, | |
522 | #endif | |
523 | { | |
524 | .ctl_name = KERN_CTLALTDEL, | |
525 | .procname = "ctrl-alt-del", | |
526 | .data = &C_A_D, | |
527 | .maxlen = sizeof(int), | |
528 | .mode = 0644, | |
529 | .proc_handler = &proc_dointvec, | |
530 | }, | |
606576ce | 531 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f SR |
532 | { |
533 | .ctl_name = CTL_UNNUMBERED, | |
534 | .procname = "ftrace_enabled", | |
535 | .data = &ftrace_enabled, | |
536 | .maxlen = sizeof(int), | |
537 | .mode = 0644, | |
538 | .proc_handler = &ftrace_enable_sysctl, | |
539 | }, | |
540 | #endif | |
f38f1d2a SR |
541 | #ifdef CONFIG_STACK_TRACER |
542 | { | |
543 | .ctl_name = CTL_UNNUMBERED, | |
544 | .procname = "stack_tracer_enabled", | |
545 | .data = &stack_tracer_enabled, | |
546 | .maxlen = sizeof(int), | |
547 | .mode = 0644, | |
548 | .proc_handler = &stack_trace_sysctl, | |
549 | }, | |
550 | #endif | |
944ac425 SR |
551 | #ifdef CONFIG_TRACING |
552 | { | |
553 | .ctl_name = CTL_UNNUMBERED, | |
3299b4dd | 554 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
555 | .data = &ftrace_dump_on_oops, |
556 | .maxlen = sizeof(int), | |
557 | .mode = 0644, | |
558 | .proc_handler = &proc_dointvec, | |
559 | }, | |
560 | #endif | |
a1ef5adb | 561 | #ifdef CONFIG_MODULES |
1da177e4 LT |
562 | { |
563 | .ctl_name = KERN_MODPROBE, | |
564 | .procname = "modprobe", | |
565 | .data = &modprobe_path, | |
566 | .maxlen = KMOD_PATH_LEN, | |
567 | .mode = 0644, | |
568 | .proc_handler = &proc_dostring, | |
569 | .strategy = &sysctl_string, | |
570 | }, | |
3d43321b KC |
571 | { |
572 | .ctl_name = CTL_UNNUMBERED, | |
573 | .procname = "modules_disabled", | |
574 | .data = &modules_disabled, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
577 | /* only handle a transition from default "0" to "1" */ | |
578 | .proc_handler = &proc_dointvec_minmax, | |
579 | .extra1 = &one, | |
580 | .extra2 = &one, | |
581 | }, | |
1da177e4 | 582 | #endif |
57ae2508 | 583 | #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET) |
1da177e4 LT |
584 | { |
585 | .ctl_name = KERN_HOTPLUG, | |
586 | .procname = "hotplug", | |
312c004d KS |
587 | .data = &uevent_helper, |
588 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 LT |
589 | .mode = 0644, |
590 | .proc_handler = &proc_dostring, | |
591 | .strategy = &sysctl_string, | |
592 | }, | |
593 | #endif | |
594 | #ifdef CONFIG_CHR_DEV_SG | |
595 | { | |
596 | .ctl_name = KERN_SG_BIG_BUFF, | |
597 | .procname = "sg-big-buff", | |
598 | .data = &sg_big_buff, | |
599 | .maxlen = sizeof (int), | |
600 | .mode = 0444, | |
601 | .proc_handler = &proc_dointvec, | |
602 | }, | |
603 | #endif | |
604 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
605 | { | |
606 | .ctl_name = KERN_ACCT, | |
607 | .procname = "acct", | |
608 | .data = &acct_parm, | |
609 | .maxlen = 3*sizeof(int), | |
610 | .mode = 0644, | |
611 | .proc_handler = &proc_dointvec, | |
612 | }, | |
613 | #endif | |
1da177e4 LT |
614 | #ifdef CONFIG_MAGIC_SYSRQ |
615 | { | |
616 | .ctl_name = KERN_SYSRQ, | |
617 | .procname = "sysrq", | |
5d6f647f | 618 | .data = &__sysrq_enabled, |
1da177e4 LT |
619 | .maxlen = sizeof (int), |
620 | .mode = 0644, | |
621 | .proc_handler = &proc_dointvec, | |
622 | }, | |
623 | #endif | |
d6f8ff73 | 624 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 625 | { |
1da177e4 | 626 | .procname = "cad_pid", |
9ec52099 | 627 | .data = NULL, |
1da177e4 LT |
628 | .maxlen = sizeof (int), |
629 | .mode = 0600, | |
9ec52099 | 630 | .proc_handler = &proc_do_cad_pid, |
1da177e4 | 631 | }, |
d6f8ff73 | 632 | #endif |
1da177e4 LT |
633 | { |
634 | .ctl_name = KERN_MAX_THREADS, | |
635 | .procname = "threads-max", | |
636 | .data = &max_threads, | |
637 | .maxlen = sizeof(int), | |
638 | .mode = 0644, | |
639 | .proc_handler = &proc_dointvec, | |
640 | }, | |
641 | { | |
642 | .ctl_name = KERN_RANDOM, | |
643 | .procname = "random", | |
644 | .mode = 0555, | |
645 | .child = random_table, | |
646 | }, | |
1da177e4 LT |
647 | { |
648 | .ctl_name = KERN_OVERFLOWUID, | |
649 | .procname = "overflowuid", | |
650 | .data = &overflowuid, | |
651 | .maxlen = sizeof(int), | |
652 | .mode = 0644, | |
653 | .proc_handler = &proc_dointvec_minmax, | |
654 | .strategy = &sysctl_intvec, | |
655 | .extra1 = &minolduid, | |
656 | .extra2 = &maxolduid, | |
657 | }, | |
658 | { | |
659 | .ctl_name = KERN_OVERFLOWGID, | |
660 | .procname = "overflowgid", | |
661 | .data = &overflowgid, | |
662 | .maxlen = sizeof(int), | |
663 | .mode = 0644, | |
664 | .proc_handler = &proc_dointvec_minmax, | |
665 | .strategy = &sysctl_intvec, | |
666 | .extra1 = &minolduid, | |
667 | .extra2 = &maxolduid, | |
668 | }, | |
347a8dc3 | 669 | #ifdef CONFIG_S390 |
1da177e4 LT |
670 | #ifdef CONFIG_MATHEMU |
671 | { | |
672 | .ctl_name = KERN_IEEE_EMULATION_WARNINGS, | |
673 | .procname = "ieee_emulation_warnings", | |
674 | .data = &sysctl_ieee_emulation_warnings, | |
675 | .maxlen = sizeof(int), | |
676 | .mode = 0644, | |
677 | .proc_handler = &proc_dointvec, | |
678 | }, | |
1da177e4 LT |
679 | #endif |
680 | { | |
681 | .ctl_name = KERN_S390_USER_DEBUG_LOGGING, | |
682 | .procname = "userprocess_debug", | |
683 | .data = &sysctl_userprocess_debug, | |
684 | .maxlen = sizeof(int), | |
685 | .mode = 0644, | |
686 | .proc_handler = &proc_dointvec, | |
687 | }, | |
688 | #endif | |
689 | { | |
690 | .ctl_name = KERN_PIDMAX, | |
691 | .procname = "pid_max", | |
692 | .data = &pid_max, | |
693 | .maxlen = sizeof (int), | |
694 | .mode = 0644, | |
695 | .proc_handler = &proc_dointvec_minmax, | |
696 | .strategy = sysctl_intvec, | |
697 | .extra1 = &pid_max_min, | |
698 | .extra2 = &pid_max_max, | |
699 | }, | |
700 | { | |
701 | .ctl_name = KERN_PANIC_ON_OOPS, | |
702 | .procname = "panic_on_oops", | |
703 | .data = &panic_on_oops, | |
704 | .maxlen = sizeof(int), | |
705 | .mode = 0644, | |
706 | .proc_handler = &proc_dointvec, | |
707 | }, | |
7ef3d2fd JP |
708 | #if defined CONFIG_PRINTK |
709 | { | |
710 | .ctl_name = KERN_PRINTK, | |
711 | .procname = "printk", | |
712 | .data = &console_loglevel, | |
713 | .maxlen = 4*sizeof(int), | |
714 | .mode = 0644, | |
715 | .proc_handler = &proc_dointvec, | |
716 | }, | |
1da177e4 LT |
717 | { |
718 | .ctl_name = KERN_PRINTK_RATELIMIT, | |
719 | .procname = "printk_ratelimit", | |
717115e1 | 720 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
721 | .maxlen = sizeof(int), |
722 | .mode = 0644, | |
723 | .proc_handler = &proc_dointvec_jiffies, | |
724 | .strategy = &sysctl_jiffies, | |
725 | }, | |
726 | { | |
727 | .ctl_name = KERN_PRINTK_RATELIMIT_BURST, | |
728 | .procname = "printk_ratelimit_burst", | |
717115e1 | 729 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
730 | .maxlen = sizeof(int), |
731 | .mode = 0644, | |
732 | .proc_handler = &proc_dointvec, | |
733 | }, | |
af91322e DY |
734 | { |
735 | .ctl_name = CTL_UNNUMBERED, | |
736 | .procname = "printk_delay", | |
737 | .data = &printk_delay_msec, | |
738 | .maxlen = sizeof(int), | |
739 | .mode = 0644, | |
740 | .proc_handler = &proc_dointvec_minmax, | |
741 | .strategy = &sysctl_intvec, | |
742 | .extra1 = &zero, | |
743 | .extra2 = &ten_thousand, | |
744 | }, | |
7ef3d2fd | 745 | #endif |
1da177e4 LT |
746 | { |
747 | .ctl_name = KERN_NGROUPS_MAX, | |
748 | .procname = "ngroups_max", | |
749 | .data = &ngroups_max, | |
750 | .maxlen = sizeof (int), | |
751 | .mode = 0444, | |
752 | .proc_handler = &proc_dointvec, | |
753 | }, | |
754 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
755 | { | |
756 | .ctl_name = KERN_UNKNOWN_NMI_PANIC, | |
757 | .procname = "unknown_nmi_panic", | |
758 | .data = &unknown_nmi_panic, | |
759 | .maxlen = sizeof (int), | |
760 | .mode = 0644, | |
2fbe7b25 | 761 | .proc_handler = &proc_dointvec, |
1da177e4 | 762 | }, |
407984f1 | 763 | { |
407984f1 DZ |
764 | .procname = "nmi_watchdog", |
765 | .data = &nmi_watchdog_enabled, | |
766 | .maxlen = sizeof (int), | |
767 | .mode = 0644, | |
768 | .proc_handler = &proc_nmi_enabled, | |
1da177e4 LT |
769 | }, |
770 | #endif | |
771 | #if defined(CONFIG_X86) | |
8da5adda DZ |
772 | { |
773 | .ctl_name = KERN_PANIC_ON_NMI, | |
774 | .procname = "panic_on_unrecovered_nmi", | |
775 | .data = &panic_on_unrecovered_nmi, | |
776 | .maxlen = sizeof(int), | |
777 | .mode = 0644, | |
778 | .proc_handler = &proc_dointvec, | |
779 | }, | |
5211a242 KG |
780 | { |
781 | .ctl_name = CTL_UNNUMBERED, | |
782 | .procname = "panic_on_io_nmi", | |
783 | .data = &panic_on_io_nmi, | |
784 | .maxlen = sizeof(int), | |
785 | .mode = 0644, | |
786 | .proc_handler = &proc_dointvec, | |
787 | }, | |
1da177e4 LT |
788 | { |
789 | .ctl_name = KERN_BOOTLOADER_TYPE, | |
790 | .procname = "bootloader_type", | |
791 | .data = &bootloader_type, | |
792 | .maxlen = sizeof (int), | |
793 | .mode = 0444, | |
794 | .proc_handler = &proc_dointvec, | |
795 | }, | |
5031296c PA |
796 | { |
797 | .ctl_name = CTL_UNNUMBERED, | |
798 | .procname = "bootloader_version", | |
799 | .data = &bootloader_version, | |
800 | .maxlen = sizeof (int), | |
801 | .mode = 0444, | |
802 | .proc_handler = &proc_dointvec, | |
803 | }, | |
0741f4d2 CE |
804 | { |
805 | .ctl_name = CTL_UNNUMBERED, | |
806 | .procname = "kstack_depth_to_print", | |
807 | .data = &kstack_depth_to_print, | |
808 | .maxlen = sizeof(int), | |
809 | .mode = 0644, | |
810 | .proc_handler = &proc_dointvec, | |
811 | }, | |
6e7c4025 IM |
812 | { |
813 | .ctl_name = CTL_UNNUMBERED, | |
814 | .procname = "io_delay_type", | |
815 | .data = &io_delay_type, | |
816 | .maxlen = sizeof(int), | |
817 | .mode = 0644, | |
818 | .proc_handler = &proc_dointvec, | |
819 | }, | |
1da177e4 | 820 | #endif |
7a9166e3 | 821 | #if defined(CONFIG_MMU) |
1da177e4 LT |
822 | { |
823 | .ctl_name = KERN_RANDOMIZE, | |
824 | .procname = "randomize_va_space", | |
825 | .data = &randomize_va_space, | |
826 | .maxlen = sizeof(int), | |
827 | .mode = 0644, | |
828 | .proc_handler = &proc_dointvec, | |
829 | }, | |
7a9166e3 | 830 | #endif |
0152fb37 | 831 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 MS |
832 | { |
833 | .ctl_name = KERN_SPIN_RETRY, | |
834 | .procname = "spin_retry", | |
835 | .data = &spin_retry, | |
836 | .maxlen = sizeof (int), | |
837 | .mode = 0644, | |
838 | .proc_handler = &proc_dointvec, | |
839 | }, | |
c255d844 | 840 | #endif |
673d5b43 | 841 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 842 | { |
c255d844 | 843 | .procname = "acpi_video_flags", |
77afcf78 | 844 | .data = &acpi_realmode_flags, |
c255d844 PM |
845 | .maxlen = sizeof (unsigned long), |
846 | .mode = 0644, | |
7f99f06f | 847 | .proc_handler = &proc_doulongvec_minmax, |
c255d844 | 848 | }, |
d2b176ed JS |
849 | #endif |
850 | #ifdef CONFIG_IA64 | |
851 | { | |
852 | .ctl_name = KERN_IA64_UNALIGNED, | |
853 | .procname = "ignore-unaligned-usertrap", | |
854 | .data = &no_unaligned_warning, | |
855 | .maxlen = sizeof (int), | |
856 | .mode = 0644, | |
857 | .proc_handler = &proc_dointvec, | |
858 | }, | |
88fc241f DC |
859 | { |
860 | .ctl_name = CTL_UNNUMBERED, | |
861 | .procname = "unaligned-dump-stack", | |
862 | .data = &unaligned_dump_stack, | |
863 | .maxlen = sizeof (int), | |
864 | .mode = 0644, | |
865 | .proc_handler = &proc_dointvec, | |
866 | }, | |
bebfa101 | 867 | #endif |
c4f3b63f | 868 | #ifdef CONFIG_DETECT_SOFTLOCKUP |
9c44bc03 IM |
869 | { |
870 | .ctl_name = CTL_UNNUMBERED, | |
871 | .procname = "softlockup_panic", | |
872 | .data = &softlockup_panic, | |
873 | .maxlen = sizeof(int), | |
874 | .mode = 0644, | |
4dca10a9 | 875 | .proc_handler = &proc_dointvec_minmax, |
9c44bc03 IM |
876 | .strategy = &sysctl_intvec, |
877 | .extra1 = &zero, | |
878 | .extra2 = &one, | |
879 | }, | |
c4f3b63f RT |
880 | { |
881 | .ctl_name = CTL_UNNUMBERED, | |
882 | .procname = "softlockup_thresh", | |
883 | .data = &softlockup_thresh, | |
9383d967 | 884 | .maxlen = sizeof(int), |
c4f3b63f | 885 | .mode = 0644, |
baf48f65 | 886 | .proc_handler = &proc_dosoftlockup_thresh, |
c4f3b63f | 887 | .strategy = &sysctl_intvec, |
9383d967 | 888 | .extra1 = &neg_one, |
c4f3b63f RT |
889 | .extra2 = &sixty, |
890 | }, | |
e162b39a MSB |
891 | #endif |
892 | #ifdef CONFIG_DETECT_HUNG_TASK | |
893 | { | |
894 | .ctl_name = CTL_UNNUMBERED, | |
895 | .procname = "hung_task_panic", | |
896 | .data = &sysctl_hung_task_panic, | |
897 | .maxlen = sizeof(int), | |
898 | .mode = 0644, | |
899 | .proc_handler = &proc_dointvec_minmax, | |
900 | .strategy = &sysctl_intvec, | |
901 | .extra1 = &zero, | |
902 | .extra2 = &one, | |
903 | }, | |
82a1fcb9 IM |
904 | { |
905 | .ctl_name = CTL_UNNUMBERED, | |
906 | .procname = "hung_task_check_count", | |
907 | .data = &sysctl_hung_task_check_count, | |
90739081 | 908 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 909 | .mode = 0644, |
90739081 | 910 | .proc_handler = &proc_doulongvec_minmax, |
82a1fcb9 IM |
911 | .strategy = &sysctl_intvec, |
912 | }, | |
913 | { | |
914 | .ctl_name = CTL_UNNUMBERED, | |
915 | .procname = "hung_task_timeout_secs", | |
916 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 917 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 918 | .mode = 0644, |
e162b39a | 919 | .proc_handler = &proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
920 | .strategy = &sysctl_intvec, |
921 | }, | |
922 | { | |
923 | .ctl_name = CTL_UNNUMBERED, | |
924 | .procname = "hung_task_warnings", | |
925 | .data = &sysctl_hung_task_warnings, | |
90739081 | 926 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 927 | .mode = 0644, |
90739081 | 928 | .proc_handler = &proc_doulongvec_minmax, |
82a1fcb9 IM |
929 | .strategy = &sysctl_intvec, |
930 | }, | |
c4f3b63f | 931 | #endif |
bebfa101 AK |
932 | #ifdef CONFIG_COMPAT |
933 | { | |
934 | .ctl_name = KERN_COMPAT_LOG, | |
935 | .procname = "compat-log", | |
936 | .data = &compat_log, | |
937 | .maxlen = sizeof (int), | |
938 | .mode = 0644, | |
939 | .proc_handler = &proc_dointvec, | |
940 | }, | |
951f22d5 | 941 | #endif |
23f78d4a IM |
942 | #ifdef CONFIG_RT_MUTEXES |
943 | { | |
944 | .ctl_name = KERN_MAX_LOCK_DEPTH, | |
945 | .procname = "max_lock_depth", | |
946 | .data = &max_lock_depth, | |
947 | .maxlen = sizeof(int), | |
948 | .mode = 0644, | |
949 | .proc_handler = &proc_dointvec, | |
950 | }, | |
5096add8 | 951 | #endif |
10a0a8d4 JF |
952 | { |
953 | .ctl_name = CTL_UNNUMBERED, | |
954 | .procname = "poweroff_cmd", | |
955 | .data = &poweroff_cmd, | |
956 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
957 | .mode = 0644, | |
958 | .proc_handler = &proc_dostring, | |
959 | .strategy = &sysctl_string, | |
960 | }, | |
0b77f5bf DH |
961 | #ifdef CONFIG_KEYS |
962 | { | |
963 | .ctl_name = CTL_UNNUMBERED, | |
964 | .procname = "keys", | |
965 | .mode = 0555, | |
966 | .child = key_sysctls, | |
967 | }, | |
968 | #endif | |
31a72bce PM |
969 | #ifdef CONFIG_RCU_TORTURE_TEST |
970 | { | |
971 | .ctl_name = CTL_UNNUMBERED, | |
972 | .procname = "rcutorture_runnable", | |
973 | .data = &rcutorture_runnable, | |
974 | .maxlen = sizeof(int), | |
975 | .mode = 0644, | |
976 | .proc_handler = &proc_dointvec, | |
977 | }, | |
978 | #endif | |
12e22c5e DH |
979 | #ifdef CONFIG_SLOW_WORK |
980 | { | |
981 | .ctl_name = CTL_UNNUMBERED, | |
982 | .procname = "slow-work", | |
983 | .mode = 0555, | |
984 | .child = slow_work_sysctls, | |
985 | }, | |
986 | #endif | |
cdd6c482 | 987 | #ifdef CONFIG_PERF_EVENTS |
1ccd1549 PZ |
988 | { |
989 | .ctl_name = CTL_UNNUMBERED, | |
cdd6c482 IM |
990 | .procname = "perf_event_paranoid", |
991 | .data = &sysctl_perf_event_paranoid, | |
992 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 PZ |
993 | .mode = 0644, |
994 | .proc_handler = &proc_dointvec, | |
995 | }, | |
c5078f78 PZ |
996 | { |
997 | .ctl_name = CTL_UNNUMBERED, | |
cdd6c482 IM |
998 | .procname = "perf_event_mlock_kb", |
999 | .data = &sysctl_perf_event_mlock, | |
1000 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 PZ |
1001 | .mode = 0644, |
1002 | .proc_handler = &proc_dointvec, | |
1003 | }, | |
a78ac325 PZ |
1004 | { |
1005 | .ctl_name = CTL_UNNUMBERED, | |
cdd6c482 IM |
1006 | .procname = "perf_event_max_sample_rate", |
1007 | .data = &sysctl_perf_event_sample_rate, | |
1008 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 PZ |
1009 | .mode = 0644, |
1010 | .proc_handler = &proc_dointvec, | |
1011 | }, | |
1ccd1549 | 1012 | #endif |
dfec072e VN |
1013 | #ifdef CONFIG_KMEMCHECK |
1014 | { | |
1015 | .ctl_name = CTL_UNNUMBERED, | |
1016 | .procname = "kmemcheck", | |
1017 | .data = &kmemcheck_enabled, | |
1018 | .maxlen = sizeof(int), | |
1019 | .mode = 0644, | |
1020 | .proc_handler = &proc_dointvec, | |
1021 | }, | |
1022 | #endif | |
cb684b5b | 1023 | #ifdef CONFIG_BLOCK |
5e605b64 JA |
1024 | { |
1025 | .ctl_name = CTL_UNNUMBERED, | |
1026 | .procname = "blk_iopoll", | |
1027 | .data = &blk_iopoll_enabled, | |
1028 | .maxlen = sizeof(int), | |
1029 | .mode = 0644, | |
1030 | .proc_handler = &proc_dointvec, | |
1031 | }, | |
cb684b5b | 1032 | #endif |
ed2c12f3 AM |
1033 | /* |
1034 | * NOTE: do not add new entries to this table unless you have read | |
1035 | * Documentation/sysctl/ctl_unnumbered.txt | |
1036 | */ | |
1da177e4 LT |
1037 | { .ctl_name = 0 } |
1038 | }; | |
1039 | ||
d8217f07 | 1040 | static struct ctl_table vm_table[] = { |
1da177e4 LT |
1041 | { |
1042 | .ctl_name = VM_OVERCOMMIT_MEMORY, | |
1043 | .procname = "overcommit_memory", | |
1044 | .data = &sysctl_overcommit_memory, | |
1045 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1046 | .mode = 0644, | |
1047 | .proc_handler = &proc_dointvec, | |
1048 | }, | |
fadd8fbd KH |
1049 | { |
1050 | .ctl_name = VM_PANIC_ON_OOM, | |
1051 | .procname = "panic_on_oom", | |
1052 | .data = &sysctl_panic_on_oom, | |
1053 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1054 | .mode = 0644, | |
1055 | .proc_handler = &proc_dointvec, | |
1056 | }, | |
fe071d7e DR |
1057 | { |
1058 | .ctl_name = CTL_UNNUMBERED, | |
1059 | .procname = "oom_kill_allocating_task", | |
1060 | .data = &sysctl_oom_kill_allocating_task, | |
1061 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1062 | .mode = 0644, | |
1063 | .proc_handler = &proc_dointvec, | |
1064 | }, | |
fef1bdd6 DR |
1065 | { |
1066 | .ctl_name = CTL_UNNUMBERED, | |
1067 | .procname = "oom_dump_tasks", | |
1068 | .data = &sysctl_oom_dump_tasks, | |
1069 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1070 | .mode = 0644, | |
1071 | .proc_handler = &proc_dointvec, | |
1072 | }, | |
1da177e4 LT |
1073 | { |
1074 | .ctl_name = VM_OVERCOMMIT_RATIO, | |
1075 | .procname = "overcommit_ratio", | |
1076 | .data = &sysctl_overcommit_ratio, | |
1077 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1078 | .mode = 0644, | |
1079 | .proc_handler = &proc_dointvec, | |
1080 | }, | |
1081 | { | |
1082 | .ctl_name = VM_PAGE_CLUSTER, | |
1083 | .procname = "page-cluster", | |
1084 | .data = &page_cluster, | |
1085 | .maxlen = sizeof(int), | |
1086 | .mode = 0644, | |
1087 | .proc_handler = &proc_dointvec, | |
1088 | }, | |
1089 | { | |
1090 | .ctl_name = VM_DIRTY_BACKGROUND, | |
1091 | .procname = "dirty_background_ratio", | |
1092 | .data = &dirty_background_ratio, | |
1093 | .maxlen = sizeof(dirty_background_ratio), | |
1094 | .mode = 0644, | |
2da02997 | 1095 | .proc_handler = &dirty_background_ratio_handler, |
1da177e4 LT |
1096 | .strategy = &sysctl_intvec, |
1097 | .extra1 = &zero, | |
1098 | .extra2 = &one_hundred, | |
1099 | }, | |
2da02997 DR |
1100 | { |
1101 | .ctl_name = CTL_UNNUMBERED, | |
1102 | .procname = "dirty_background_bytes", | |
1103 | .data = &dirty_background_bytes, | |
1104 | .maxlen = sizeof(dirty_background_bytes), | |
1105 | .mode = 0644, | |
1106 | .proc_handler = &dirty_background_bytes_handler, | |
1107 | .strategy = &sysctl_intvec, | |
fc3501d4 | 1108 | .extra1 = &one_ul, |
2da02997 | 1109 | }, |
1da177e4 LT |
1110 | { |
1111 | .ctl_name = VM_DIRTY_RATIO, | |
1112 | .procname = "dirty_ratio", | |
1113 | .data = &vm_dirty_ratio, | |
1114 | .maxlen = sizeof(vm_dirty_ratio), | |
1115 | .mode = 0644, | |
04fbfdc1 | 1116 | .proc_handler = &dirty_ratio_handler, |
1da177e4 LT |
1117 | .strategy = &sysctl_intvec, |
1118 | .extra1 = &zero, | |
1119 | .extra2 = &one_hundred, | |
1120 | }, | |
2da02997 DR |
1121 | { |
1122 | .ctl_name = CTL_UNNUMBERED, | |
1123 | .procname = "dirty_bytes", | |
1124 | .data = &vm_dirty_bytes, | |
1125 | .maxlen = sizeof(vm_dirty_bytes), | |
1126 | .mode = 0644, | |
1127 | .proc_handler = &dirty_bytes_handler, | |
1128 | .strategy = &sysctl_intvec, | |
9e4a5bda | 1129 | .extra1 = &dirty_bytes_min, |
2da02997 | 1130 | }, |
1da177e4 | 1131 | { |
1da177e4 | 1132 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1133 | .data = &dirty_writeback_interval, |
1134 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 LT |
1135 | .mode = 0644, |
1136 | .proc_handler = &dirty_writeback_centisecs_handler, | |
1137 | }, | |
1138 | { | |
1da177e4 | 1139 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1140 | .data = &dirty_expire_interval, |
1141 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1142 | .mode = 0644, |
704503d8 | 1143 | .proc_handler = &proc_dointvec, |
1da177e4 LT |
1144 | }, |
1145 | { | |
1146 | .ctl_name = VM_NR_PDFLUSH_THREADS, | |
1147 | .procname = "nr_pdflush_threads", | |
1148 | .data = &nr_pdflush_threads, | |
1149 | .maxlen = sizeof nr_pdflush_threads, | |
1150 | .mode = 0444 /* read-only*/, | |
1151 | .proc_handler = &proc_dointvec, | |
1152 | }, | |
1153 | { | |
1154 | .ctl_name = VM_SWAPPINESS, | |
1155 | .procname = "swappiness", | |
1156 | .data = &vm_swappiness, | |
1157 | .maxlen = sizeof(vm_swappiness), | |
1158 | .mode = 0644, | |
1159 | .proc_handler = &proc_dointvec_minmax, | |
1160 | .strategy = &sysctl_intvec, | |
1161 | .extra1 = &zero, | |
1162 | .extra2 = &one_hundred, | |
1163 | }, | |
1164 | #ifdef CONFIG_HUGETLB_PAGE | |
1165 | { | |
1da177e4 | 1166 | .procname = "nr_hugepages", |
e5ff2159 | 1167 | .data = NULL, |
1da177e4 LT |
1168 | .maxlen = sizeof(unsigned long), |
1169 | .mode = 0644, | |
1170 | .proc_handler = &hugetlb_sysctl_handler, | |
1171 | .extra1 = (void *)&hugetlb_zero, | |
1172 | .extra2 = (void *)&hugetlb_infinity, | |
1173 | }, | |
1174 | { | |
1175 | .ctl_name = VM_HUGETLB_GROUP, | |
1176 | .procname = "hugetlb_shm_group", | |
1177 | .data = &sysctl_hugetlb_shm_group, | |
1178 | .maxlen = sizeof(gid_t), | |
1179 | .mode = 0644, | |
1180 | .proc_handler = &proc_dointvec, | |
1181 | }, | |
396faf03 MG |
1182 | { |
1183 | .ctl_name = CTL_UNNUMBERED, | |
1184 | .procname = "hugepages_treat_as_movable", | |
1185 | .data = &hugepages_treat_as_movable, | |
1186 | .maxlen = sizeof(int), | |
1187 | .mode = 0644, | |
1188 | .proc_handler = &hugetlb_treat_movable_handler, | |
1189 | }, | |
d1c3fb1f NA |
1190 | { |
1191 | .ctl_name = CTL_UNNUMBERED, | |
1192 | .procname = "nr_overcommit_hugepages", | |
e5ff2159 AK |
1193 | .data = NULL, |
1194 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1195 | .mode = 0644, |
a3d0c6aa | 1196 | .proc_handler = &hugetlb_overcommit_handler, |
e5ff2159 AK |
1197 | .extra1 = (void *)&hugetlb_zero, |
1198 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1199 | }, |
1da177e4 LT |
1200 | #endif |
1201 | { | |
1202 | .ctl_name = VM_LOWMEM_RESERVE_RATIO, | |
1203 | .procname = "lowmem_reserve_ratio", | |
1204 | .data = &sysctl_lowmem_reserve_ratio, | |
1205 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1206 | .mode = 0644, | |
1207 | .proc_handler = &lowmem_reserve_ratio_sysctl_handler, | |
1208 | .strategy = &sysctl_intvec, | |
1209 | }, | |
9d0243bc AM |
1210 | { |
1211 | .ctl_name = VM_DROP_PAGECACHE, | |
1212 | .procname = "drop_caches", | |
1213 | .data = &sysctl_drop_caches, | |
1214 | .maxlen = sizeof(int), | |
1215 | .mode = 0644, | |
1216 | .proc_handler = drop_caches_sysctl_handler, | |
1217 | .strategy = &sysctl_intvec, | |
1218 | }, | |
1da177e4 LT |
1219 | { |
1220 | .ctl_name = VM_MIN_FREE_KBYTES, | |
1221 | .procname = "min_free_kbytes", | |
1222 | .data = &min_free_kbytes, | |
1223 | .maxlen = sizeof(min_free_kbytes), | |
1224 | .mode = 0644, | |
1225 | .proc_handler = &min_free_kbytes_sysctl_handler, | |
1226 | .strategy = &sysctl_intvec, | |
1227 | .extra1 = &zero, | |
1228 | }, | |
8ad4b1fb RS |
1229 | { |
1230 | .ctl_name = VM_PERCPU_PAGELIST_FRACTION, | |
1231 | .procname = "percpu_pagelist_fraction", | |
1232 | .data = &percpu_pagelist_fraction, | |
1233 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1234 | .mode = 0644, | |
1235 | .proc_handler = &percpu_pagelist_fraction_sysctl_handler, | |
1236 | .strategy = &sysctl_intvec, | |
1237 | .extra1 = &min_percpu_pagelist_fract, | |
1238 | }, | |
1da177e4 LT |
1239 | #ifdef CONFIG_MMU |
1240 | { | |
1241 | .ctl_name = VM_MAX_MAP_COUNT, | |
1242 | .procname = "max_map_count", | |
1243 | .data = &sysctl_max_map_count, | |
1244 | .maxlen = sizeof(sysctl_max_map_count), | |
1245 | .mode = 0644, | |
1246 | .proc_handler = &proc_dointvec | |
1247 | }, | |
dd8632a1 PM |
1248 | #else |
1249 | { | |
1250 | .ctl_name = CTL_UNNUMBERED, | |
1251 | .procname = "nr_trim_pages", | |
1252 | .data = &sysctl_nr_trim_pages, | |
1253 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1254 | .mode = 0644, | |
1255 | .proc_handler = &proc_dointvec_minmax, | |
1256 | .strategy = &sysctl_intvec, | |
1257 | .extra1 = &zero, | |
1258 | }, | |
1da177e4 LT |
1259 | #endif |
1260 | { | |
1261 | .ctl_name = VM_LAPTOP_MODE, | |
1262 | .procname = "laptop_mode", | |
1263 | .data = &laptop_mode, | |
1264 | .maxlen = sizeof(laptop_mode), | |
1265 | .mode = 0644, | |
ed5b43f1 BS |
1266 | .proc_handler = &proc_dointvec_jiffies, |
1267 | .strategy = &sysctl_jiffies, | |
1da177e4 LT |
1268 | }, |
1269 | { | |
1270 | .ctl_name = VM_BLOCK_DUMP, | |
1271 | .procname = "block_dump", | |
1272 | .data = &block_dump, | |
1273 | .maxlen = sizeof(block_dump), | |
1274 | .mode = 0644, | |
1275 | .proc_handler = &proc_dointvec, | |
1276 | .strategy = &sysctl_intvec, | |
1277 | .extra1 = &zero, | |
1278 | }, | |
1279 | { | |
1280 | .ctl_name = VM_VFS_CACHE_PRESSURE, | |
1281 | .procname = "vfs_cache_pressure", | |
1282 | .data = &sysctl_vfs_cache_pressure, | |
1283 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1284 | .mode = 0644, | |
1285 | .proc_handler = &proc_dointvec, | |
1286 | .strategy = &sysctl_intvec, | |
1287 | .extra1 = &zero, | |
1288 | }, | |
1289 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1290 | { | |
1291 | .ctl_name = VM_LEGACY_VA_LAYOUT, | |
1292 | .procname = "legacy_va_layout", | |
1293 | .data = &sysctl_legacy_va_layout, | |
1294 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1295 | .mode = 0644, | |
1296 | .proc_handler = &proc_dointvec, | |
1297 | .strategy = &sysctl_intvec, | |
1298 | .extra1 = &zero, | |
1299 | }, | |
1300 | #endif | |
1743660b CL |
1301 | #ifdef CONFIG_NUMA |
1302 | { | |
1303 | .ctl_name = VM_ZONE_RECLAIM_MODE, | |
1304 | .procname = "zone_reclaim_mode", | |
1305 | .data = &zone_reclaim_mode, | |
1306 | .maxlen = sizeof(zone_reclaim_mode), | |
1307 | .mode = 0644, | |
1308 | .proc_handler = &proc_dointvec, | |
c84db23c CL |
1309 | .strategy = &sysctl_intvec, |
1310 | .extra1 = &zero, | |
1743660b | 1311 | }, |
9614634f CL |
1312 | { |
1313 | .ctl_name = VM_MIN_UNMAPPED, | |
1314 | .procname = "min_unmapped_ratio", | |
1315 | .data = &sysctl_min_unmapped_ratio, | |
1316 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1317 | .mode = 0644, | |
1318 | .proc_handler = &sysctl_min_unmapped_ratio_sysctl_handler, | |
1319 | .strategy = &sysctl_intvec, | |
1320 | .extra1 = &zero, | |
1321 | .extra2 = &one_hundred, | |
1322 | }, | |
0ff38490 CL |
1323 | { |
1324 | .ctl_name = VM_MIN_SLAB, | |
1325 | .procname = "min_slab_ratio", | |
1326 | .data = &sysctl_min_slab_ratio, | |
1327 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1328 | .mode = 0644, | |
1329 | .proc_handler = &sysctl_min_slab_ratio_sysctl_handler, | |
1330 | .strategy = &sysctl_intvec, | |
1331 | .extra1 = &zero, | |
1332 | .extra2 = &one_hundred, | |
1333 | }, | |
e6e5494c | 1334 | #endif |
77461ab3 CL |
1335 | #ifdef CONFIG_SMP |
1336 | { | |
1337 | .ctl_name = CTL_UNNUMBERED, | |
1338 | .procname = "stat_interval", | |
1339 | .data = &sysctl_stat_interval, | |
1340 | .maxlen = sizeof(sysctl_stat_interval), | |
1341 | .mode = 0644, | |
1342 | .proc_handler = &proc_dointvec_jiffies, | |
1343 | .strategy = &sysctl_jiffies, | |
1344 | }, | |
1345 | #endif | |
ed032189 EP |
1346 | { |
1347 | .ctl_name = CTL_UNNUMBERED, | |
1348 | .procname = "mmap_min_addr", | |
788084ab EP |
1349 | .data = &dac_mmap_min_addr, |
1350 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1351 | .mode = 0644, |
788084ab | 1352 | .proc_handler = &mmap_min_addr_handler, |
ed032189 | 1353 | }, |
f0c0b2b8 KH |
1354 | #ifdef CONFIG_NUMA |
1355 | { | |
1356 | .ctl_name = CTL_UNNUMBERED, | |
1357 | .procname = "numa_zonelist_order", | |
1358 | .data = &numa_zonelist_order, | |
1359 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1360 | .mode = 0644, | |
1361 | .proc_handler = &numa_zonelist_order_handler, | |
1362 | .strategy = &sysctl_string, | |
1363 | }, | |
1364 | #endif | |
2b8232ce | 1365 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1366 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c IM |
1367 | { |
1368 | .ctl_name = VM_VDSO_ENABLED, | |
1369 | .procname = "vdso_enabled", | |
1370 | .data = &vdso_enabled, | |
1371 | .maxlen = sizeof(vdso_enabled), | |
1372 | .mode = 0644, | |
1373 | .proc_handler = &proc_dointvec, | |
1374 | .strategy = &sysctl_intvec, | |
1375 | .extra1 = &zero, | |
1376 | }, | |
1da177e4 | 1377 | #endif |
195cf453 BG |
1378 | #ifdef CONFIG_HIGHMEM |
1379 | { | |
1380 | .ctl_name = CTL_UNNUMBERED, | |
1381 | .procname = "highmem_is_dirtyable", | |
1382 | .data = &vm_highmem_is_dirtyable, | |
1383 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1384 | .mode = 0644, | |
1385 | .proc_handler = &proc_dointvec_minmax, | |
1386 | .strategy = &sysctl_intvec, | |
1387 | .extra1 = &zero, | |
1388 | .extra2 = &one, | |
1389 | }, | |
1390 | #endif | |
4be6f6bb PZ |
1391 | { |
1392 | .ctl_name = CTL_UNNUMBERED, | |
1393 | .procname = "scan_unevictable_pages", | |
1394 | .data = &scan_unevictable_pages, | |
1395 | .maxlen = sizeof(scan_unevictable_pages), | |
1396 | .mode = 0644, | |
1397 | .proc_handler = &scan_unevictable_handler, | |
1398 | }, | |
6a46079c AK |
1399 | #ifdef CONFIG_MEMORY_FAILURE |
1400 | { | |
1401 | .ctl_name = CTL_UNNUMBERED, | |
1402 | .procname = "memory_failure_early_kill", | |
1403 | .data = &sysctl_memory_failure_early_kill, | |
1404 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1405 | .mode = 0644, | |
1406 | .proc_handler = &proc_dointvec_minmax, | |
1407 | .strategy = &sysctl_intvec, | |
1408 | .extra1 = &zero, | |
1409 | .extra2 = &one, | |
1410 | }, | |
1411 | { | |
1412 | .ctl_name = CTL_UNNUMBERED, | |
1413 | .procname = "memory_failure_recovery", | |
1414 | .data = &sysctl_memory_failure_recovery, | |
1415 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1416 | .mode = 0644, | |
1417 | .proc_handler = &proc_dointvec_minmax, | |
1418 | .strategy = &sysctl_intvec, | |
1419 | .extra1 = &zero, | |
1420 | .extra2 = &one, | |
1421 | }, | |
1422 | #endif | |
1423 | ||
2be7fe07 AM |
1424 | /* |
1425 | * NOTE: do not add new entries to this table unless you have read | |
1426 | * Documentation/sysctl/ctl_unnumbered.txt | |
1427 | */ | |
1da177e4 LT |
1428 | { .ctl_name = 0 } |
1429 | }; | |
1430 | ||
2abc26fc | 1431 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1432 | static struct ctl_table binfmt_misc_table[] = { |
2abc26fc EB |
1433 | { .ctl_name = 0 } |
1434 | }; | |
1435 | #endif | |
1436 | ||
d8217f07 | 1437 | static struct ctl_table fs_table[] = { |
1da177e4 LT |
1438 | { |
1439 | .ctl_name = FS_NRINODE, | |
1440 | .procname = "inode-nr", | |
1441 | .data = &inodes_stat, | |
1442 | .maxlen = 2*sizeof(int), | |
1443 | .mode = 0444, | |
1444 | .proc_handler = &proc_dointvec, | |
1445 | }, | |
1446 | { | |
1447 | .ctl_name = FS_STATINODE, | |
1448 | .procname = "inode-state", | |
1449 | .data = &inodes_stat, | |
1450 | .maxlen = 7*sizeof(int), | |
1451 | .mode = 0444, | |
1452 | .proc_handler = &proc_dointvec, | |
1453 | }, | |
1454 | { | |
1da177e4 LT |
1455 | .procname = "file-nr", |
1456 | .data = &files_stat, | |
1457 | .maxlen = 3*sizeof(int), | |
1458 | .mode = 0444, | |
529bf6be | 1459 | .proc_handler = &proc_nr_files, |
1da177e4 LT |
1460 | }, |
1461 | { | |
1462 | .ctl_name = FS_MAXFILE, | |
1463 | .procname = "file-max", | |
1464 | .data = &files_stat.max_files, | |
1465 | .maxlen = sizeof(int), | |
1466 | .mode = 0644, | |
1467 | .proc_handler = &proc_dointvec, | |
1468 | }, | |
9cfe015a ED |
1469 | { |
1470 | .ctl_name = CTL_UNNUMBERED, | |
1471 | .procname = "nr_open", | |
1472 | .data = &sysctl_nr_open, | |
1473 | .maxlen = sizeof(int), | |
1474 | .mode = 0644, | |
eceea0b3 AV |
1475 | .proc_handler = &proc_dointvec_minmax, |
1476 | .extra1 = &sysctl_nr_open_min, | |
1477 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1478 | }, |
1da177e4 LT |
1479 | { |
1480 | .ctl_name = FS_DENTRY, | |
1481 | .procname = "dentry-state", | |
1482 | .data = &dentry_stat, | |
1483 | .maxlen = 6*sizeof(int), | |
1484 | .mode = 0444, | |
1485 | .proc_handler = &proc_dointvec, | |
1486 | }, | |
1487 | { | |
1488 | .ctl_name = FS_OVERFLOWUID, | |
1489 | .procname = "overflowuid", | |
1490 | .data = &fs_overflowuid, | |
1491 | .maxlen = sizeof(int), | |
1492 | .mode = 0644, | |
1493 | .proc_handler = &proc_dointvec_minmax, | |
1494 | .strategy = &sysctl_intvec, | |
1495 | .extra1 = &minolduid, | |
1496 | .extra2 = &maxolduid, | |
1497 | }, | |
1498 | { | |
1499 | .ctl_name = FS_OVERFLOWGID, | |
1500 | .procname = "overflowgid", | |
1501 | .data = &fs_overflowgid, | |
1502 | .maxlen = sizeof(int), | |
1503 | .mode = 0644, | |
1504 | .proc_handler = &proc_dointvec_minmax, | |
1505 | .strategy = &sysctl_intvec, | |
1506 | .extra1 = &minolduid, | |
1507 | .extra2 = &maxolduid, | |
1508 | }, | |
bfcd17a6 | 1509 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 LT |
1510 | { |
1511 | .ctl_name = FS_LEASES, | |
1512 | .procname = "leases-enable", | |
1513 | .data = &leases_enable, | |
1514 | .maxlen = sizeof(int), | |
1515 | .mode = 0644, | |
1516 | .proc_handler = &proc_dointvec, | |
1517 | }, | |
bfcd17a6 | 1518 | #endif |
1da177e4 LT |
1519 | #ifdef CONFIG_DNOTIFY |
1520 | { | |
1521 | .ctl_name = FS_DIR_NOTIFY, | |
1522 | .procname = "dir-notify-enable", | |
1523 | .data = &dir_notify_enable, | |
1524 | .maxlen = sizeof(int), | |
1525 | .mode = 0644, | |
1526 | .proc_handler = &proc_dointvec, | |
1527 | }, | |
1528 | #endif | |
1529 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1530 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 LT |
1531 | { |
1532 | .ctl_name = FS_LEASE_TIME, | |
1533 | .procname = "lease-break-time", | |
1534 | .data = &lease_break_time, | |
1535 | .maxlen = sizeof(int), | |
1536 | .mode = 0644, | |
8e654fba | 1537 | .proc_handler = &proc_dointvec, |
1da177e4 | 1538 | }, |
bfcd17a6 | 1539 | #endif |
ebf3f09c | 1540 | #ifdef CONFIG_AIO |
1da177e4 | 1541 | { |
1da177e4 LT |
1542 | .procname = "aio-nr", |
1543 | .data = &aio_nr, | |
1544 | .maxlen = sizeof(aio_nr), | |
1545 | .mode = 0444, | |
d55b5fda | 1546 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 LT |
1547 | }, |
1548 | { | |
1da177e4 LT |
1549 | .procname = "aio-max-nr", |
1550 | .data = &aio_max_nr, | |
1551 | .maxlen = sizeof(aio_max_nr), | |
1552 | .mode = 0644, | |
d55b5fda | 1553 | .proc_handler = &proc_doulongvec_minmax, |
1da177e4 | 1554 | }, |
ebf3f09c | 1555 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1556 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 RL |
1557 | { |
1558 | .ctl_name = FS_INOTIFY, | |
1559 | .procname = "inotify", | |
1560 | .mode = 0555, | |
1561 | .child = inotify_table, | |
1562 | }, | |
1563 | #endif | |
7ef9964e DL |
1564 | #ifdef CONFIG_EPOLL |
1565 | { | |
1566 | .procname = "epoll", | |
1567 | .mode = 0555, | |
1568 | .child = epoll_table, | |
1569 | }, | |
1570 | #endif | |
1da177e4 | 1571 | #endif |
d6e71144 AC |
1572 | { |
1573 | .ctl_name = KERN_SETUID_DUMPABLE, | |
1574 | .procname = "suid_dumpable", | |
1575 | .data = &suid_dumpable, | |
1576 | .maxlen = sizeof(int), | |
1577 | .mode = 0644, | |
8e654fba MW |
1578 | .proc_handler = &proc_dointvec_minmax, |
1579 | .strategy = &sysctl_intvec, | |
1580 | .extra1 = &zero, | |
1581 | .extra2 = &two, | |
d6e71144 | 1582 | }, |
2abc26fc EB |
1583 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1584 | { | |
1585 | .ctl_name = CTL_UNNUMBERED, | |
1586 | .procname = "binfmt_misc", | |
1587 | .mode = 0555, | |
1588 | .child = binfmt_misc_table, | |
1589 | }, | |
1590 | #endif | |
2be7fe07 AM |
1591 | /* |
1592 | * NOTE: do not add new entries to this table unless you have read | |
1593 | * Documentation/sysctl/ctl_unnumbered.txt | |
2be7fe07 | 1594 | */ |
1da177e4 LT |
1595 | { .ctl_name = 0 } |
1596 | }; | |
1597 | ||
d8217f07 | 1598 | static struct ctl_table debug_table[] = { |
d0c3d534 | 1599 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) |
abd4f750 MAS |
1600 | { |
1601 | .ctl_name = CTL_UNNUMBERED, | |
1602 | .procname = "exception-trace", | |
1603 | .data = &show_unhandled_signals, | |
1604 | .maxlen = sizeof(int), | |
1605 | .mode = 0644, | |
1606 | .proc_handler = proc_dointvec | |
1607 | }, | |
1608 | #endif | |
1da177e4 LT |
1609 | { .ctl_name = 0 } |
1610 | }; | |
1611 | ||
d8217f07 | 1612 | static struct ctl_table dev_table[] = { |
1da177e4 | 1613 | { .ctl_name = 0 } |
0eeca283 | 1614 | }; |
1da177e4 | 1615 | |
330d57fb AV |
1616 | static DEFINE_SPINLOCK(sysctl_lock); |
1617 | ||
1618 | /* called under sysctl_lock */ | |
1619 | static int use_table(struct ctl_table_header *p) | |
1620 | { | |
1621 | if (unlikely(p->unregistering)) | |
1622 | return 0; | |
1623 | p->used++; | |
1624 | return 1; | |
1625 | } | |
1626 | ||
1627 | /* called under sysctl_lock */ | |
1628 | static void unuse_table(struct ctl_table_header *p) | |
1629 | { | |
1630 | if (!--p->used) | |
1631 | if (unlikely(p->unregistering)) | |
1632 | complete(p->unregistering); | |
1633 | } | |
1634 | ||
1635 | /* called under sysctl_lock, will reacquire if has to wait */ | |
1636 | static void start_unregistering(struct ctl_table_header *p) | |
1637 | { | |
1638 | /* | |
1639 | * if p->used is 0, nobody will ever touch that entry again; | |
1640 | * we'll eliminate all paths to it before dropping sysctl_lock | |
1641 | */ | |
1642 | if (unlikely(p->used)) { | |
1643 | struct completion wait; | |
1644 | init_completion(&wait); | |
1645 | p->unregistering = &wait; | |
1646 | spin_unlock(&sysctl_lock); | |
1647 | wait_for_completion(&wait); | |
1648 | spin_lock(&sysctl_lock); | |
f7e6ced4 AV |
1649 | } else { |
1650 | /* anything non-NULL; we'll never dereference it */ | |
1651 | p->unregistering = ERR_PTR(-EINVAL); | |
330d57fb AV |
1652 | } |
1653 | /* | |
1654 | * do not remove from the list until nobody holds it; walking the | |
1655 | * list in do_sysctl() relies on that. | |
1656 | */ | |
1657 | list_del_init(&p->ctl_entry); | |
1658 | } | |
1659 | ||
f7e6ced4 AV |
1660 | void sysctl_head_get(struct ctl_table_header *head) |
1661 | { | |
1662 | spin_lock(&sysctl_lock); | |
1663 | head->count++; | |
1664 | spin_unlock(&sysctl_lock); | |
1665 | } | |
1666 | ||
1667 | void sysctl_head_put(struct ctl_table_header *head) | |
1668 | { | |
1669 | spin_lock(&sysctl_lock); | |
1670 | if (!--head->count) | |
1671 | kfree(head); | |
1672 | spin_unlock(&sysctl_lock); | |
1673 | } | |
1674 | ||
1675 | struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) | |
1676 | { | |
1677 | if (!head) | |
1678 | BUG(); | |
1679 | spin_lock(&sysctl_lock); | |
1680 | if (!use_table(head)) | |
1681 | head = ERR_PTR(-ENOENT); | |
1682 | spin_unlock(&sysctl_lock); | |
1683 | return head; | |
1684 | } | |
1685 | ||
805b5d5e EB |
1686 | void sysctl_head_finish(struct ctl_table_header *head) |
1687 | { | |
1688 | if (!head) | |
1689 | return; | |
1690 | spin_lock(&sysctl_lock); | |
1691 | unuse_table(head); | |
1692 | spin_unlock(&sysctl_lock); | |
1693 | } | |
1694 | ||
73455092 AV |
1695 | static struct ctl_table_set * |
1696 | lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) | |
1697 | { | |
1698 | struct ctl_table_set *set = &root->default_set; | |
1699 | if (root->lookup) | |
1700 | set = root->lookup(root, namespaces); | |
1701 | return set; | |
1702 | } | |
1703 | ||
e51b6ba0 EB |
1704 | static struct list_head * |
1705 | lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) | |
805b5d5e | 1706 | { |
73455092 AV |
1707 | struct ctl_table_set *set = lookup_header_set(root, namespaces); |
1708 | return &set->list; | |
e51b6ba0 EB |
1709 | } |
1710 | ||
1711 | struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, | |
1712 | struct ctl_table_header *prev) | |
1713 | { | |
1714 | struct ctl_table_root *root; | |
1715 | struct list_head *header_list; | |
805b5d5e EB |
1716 | struct ctl_table_header *head; |
1717 | struct list_head *tmp; | |
e51b6ba0 | 1718 | |
805b5d5e EB |
1719 | spin_lock(&sysctl_lock); |
1720 | if (prev) { | |
e51b6ba0 | 1721 | head = prev; |
805b5d5e EB |
1722 | tmp = &prev->ctl_entry; |
1723 | unuse_table(prev); | |
1724 | goto next; | |
1725 | } | |
1726 | tmp = &root_table_header.ctl_entry; | |
1727 | for (;;) { | |
1728 | head = list_entry(tmp, struct ctl_table_header, ctl_entry); | |
1729 | ||
1730 | if (!use_table(head)) | |
1731 | goto next; | |
1732 | spin_unlock(&sysctl_lock); | |
1733 | return head; | |
1734 | next: | |
e51b6ba0 | 1735 | root = head->root; |
805b5d5e | 1736 | tmp = tmp->next; |
e51b6ba0 EB |
1737 | header_list = lookup_header_list(root, namespaces); |
1738 | if (tmp != header_list) | |
1739 | continue; | |
1740 | ||
1741 | do { | |
1742 | root = list_entry(root->root_list.next, | |
1743 | struct ctl_table_root, root_list); | |
1744 | if (root == &sysctl_table_root) | |
1745 | goto out; | |
1746 | header_list = lookup_header_list(root, namespaces); | |
1747 | } while (list_empty(header_list)); | |
1748 | tmp = header_list->next; | |
805b5d5e | 1749 | } |
e51b6ba0 | 1750 | out: |
805b5d5e EB |
1751 | spin_unlock(&sysctl_lock); |
1752 | return NULL; | |
1753 | } | |
1754 | ||
e51b6ba0 EB |
1755 | struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) |
1756 | { | |
1757 | return __sysctl_head_next(current->nsproxy, prev); | |
1758 | } | |
1759 | ||
1760 | void register_sysctl_root(struct ctl_table_root *root) | |
1761 | { | |
1762 | spin_lock(&sysctl_lock); | |
1763 | list_add_tail(&root->root_list, &sysctl_table_root.root_list); | |
1764 | spin_unlock(&sysctl_lock); | |
1765 | } | |
1766 | ||
1da177e4 | 1767 | /* |
1ff007eb | 1768 | * sysctl_perm does NOT grant the superuser all rights automatically, because |
1da177e4 LT |
1769 | * some sysctl variables are readonly even to root. |
1770 | */ | |
1771 | ||
1772 | static int test_perm(int mode, int op) | |
1773 | { | |
76aac0e9 | 1774 | if (!current_euid()) |
1da177e4 LT |
1775 | mode >>= 6; |
1776 | else if (in_egroup_p(0)) | |
1777 | mode >>= 3; | |
e6305c43 | 1778 | if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) |
1da177e4 LT |
1779 | return 0; |
1780 | return -EACCES; | |
1781 | } | |
1782 | ||
d7321cd6 | 1783 | int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) |
1da177e4 LT |
1784 | { |
1785 | int error; | |
d7321cd6 PE |
1786 | int mode; |
1787 | ||
e6305c43 | 1788 | error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); |
1da177e4 LT |
1789 | if (error) |
1790 | return error; | |
d7321cd6 PE |
1791 | |
1792 | if (root->permissions) | |
1793 | mode = root->permissions(root, current->nsproxy, table); | |
1794 | else | |
1795 | mode = table->mode; | |
1796 | ||
1797 | return test_perm(mode, op); | |
1da177e4 LT |
1798 | } |
1799 | ||
d912b0cc EB |
1800 | static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) |
1801 | { | |
1802 | for (; table->ctl_name || table->procname; table++) { | |
1803 | table->parent = parent; | |
1804 | if (table->child) | |
1805 | sysctl_set_parent(table, table->child); | |
1806 | } | |
1807 | } | |
1808 | ||
1809 | static __init int sysctl_init(void) | |
1810 | { | |
1811 | sysctl_set_parent(NULL, root_table); | |
88f458e4 HS |
1812 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
1813 | { | |
1814 | int err; | |
1815 | err = sysctl_check_table(current->nsproxy, root_table); | |
1816 | } | |
1817 | #endif | |
d912b0cc EB |
1818 | return 0; |
1819 | } | |
1820 | ||
1821 | core_initcall(sysctl_init); | |
1822 | ||
bfbcf034 AV |
1823 | static struct ctl_table *is_branch_in(struct ctl_table *branch, |
1824 | struct ctl_table *table) | |
ae7edecc AV |
1825 | { |
1826 | struct ctl_table *p; | |
1827 | const char *s = branch->procname; | |
1828 | ||
1829 | /* branch should have named subdirectory as its first element */ | |
1830 | if (!s || !branch->child) | |
bfbcf034 | 1831 | return NULL; |
ae7edecc AV |
1832 | |
1833 | /* ... and nothing else */ | |
1834 | if (branch[1].procname || branch[1].ctl_name) | |
bfbcf034 | 1835 | return NULL; |
ae7edecc AV |
1836 | |
1837 | /* table should contain subdirectory with the same name */ | |
1838 | for (p = table; p->procname || p->ctl_name; p++) { | |
1839 | if (!p->child) | |
1840 | continue; | |
1841 | if (p->procname && strcmp(p->procname, s) == 0) | |
bfbcf034 | 1842 | return p; |
ae7edecc | 1843 | } |
bfbcf034 | 1844 | return NULL; |
ae7edecc AV |
1845 | } |
1846 | ||
1847 | /* see if attaching q to p would be an improvement */ | |
1848 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) | |
1849 | { | |
1850 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; | |
bfbcf034 | 1851 | struct ctl_table *next; |
ae7edecc AV |
1852 | int is_better = 0; |
1853 | int not_in_parent = !p->attached_by; | |
1854 | ||
bfbcf034 | 1855 | while ((next = is_branch_in(by, to)) != NULL) { |
ae7edecc AV |
1856 | if (by == q->attached_by) |
1857 | is_better = 1; | |
1858 | if (to == p->attached_by) | |
1859 | not_in_parent = 1; | |
1860 | by = by->child; | |
bfbcf034 | 1861 | to = next->child; |
ae7edecc AV |
1862 | } |
1863 | ||
1864 | if (is_better && not_in_parent) { | |
1865 | q->attached_by = by; | |
1866 | q->attached_to = to; | |
1867 | q->parent = p; | |
1868 | } | |
1869 | } | |
1870 | ||
1da177e4 | 1871 | /** |
e51b6ba0 EB |
1872 | * __register_sysctl_paths - register a sysctl hierarchy |
1873 | * @root: List of sysctl headers to register on | |
1874 | * @namespaces: Data to compute which lists of sysctl entries are visible | |
29e796fd | 1875 | * @path: The path to the directory the sysctl table is in. |
1da177e4 | 1876 | * @table: the top-level table structure |
1da177e4 LT |
1877 | * |
1878 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
29e796fd | 1879 | * array. A completely 0 filled entry terminates the table. |
1da177e4 | 1880 | * |
d8217f07 | 1881 | * The members of the &struct ctl_table structure are used as follows: |
1da177e4 LT |
1882 | * |
1883 | * ctl_name - This is the numeric sysctl value used by sysctl(2). The number | |
1884 | * must be unique within that level of sysctl | |
1885 | * | |
1886 | * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not | |
1887 | * enter a sysctl file | |
1888 | * | |
1889 | * data - a pointer to data for use by proc_handler | |
1890 | * | |
1891 | * maxlen - the maximum size in bytes of the data | |
1892 | * | |
1893 | * mode - the file permissions for the /proc/sys file, and for sysctl(2) | |
1894 | * | |
1895 | * child - a pointer to the child sysctl table if this entry is a directory, or | |
1896 | * %NULL. | |
1897 | * | |
1898 | * proc_handler - the text handler routine (described below) | |
1899 | * | |
1900 | * strategy - the strategy routine (described below) | |
1901 | * | |
1902 | * de - for internal use by the sysctl routines | |
1903 | * | |
1904 | * extra1, extra2 - extra pointers usable by the proc handler routines | |
1905 | * | |
1906 | * Leaf nodes in the sysctl tree will be represented by a single file | |
1907 | * under /proc; non-leaf nodes will be represented by directories. | |
1908 | * | |
1909 | * sysctl(2) can automatically manage read and write requests through | |
1910 | * the sysctl table. The data and maxlen fields of the ctl_table | |
1911 | * struct enable minimal validation of the values being written to be | |
1912 | * performed, and the mode field allows minimal authentication. | |
1913 | * | |
1914 | * More sophisticated management can be enabled by the provision of a | |
1915 | * strategy routine with the table entry. This will be called before | |
1916 | * any automatic read or write of the data is performed. | |
1917 | * | |
1918 | * The strategy routine may return | |
1919 | * | |
1920 | * < 0 - Error occurred (error is passed to user process) | |
1921 | * | |
1922 | * 0 - OK - proceed with automatic read or write. | |
1923 | * | |
1924 | * > 0 - OK - read or write has been done by the strategy routine, so | |
1925 | * return immediately. | |
1926 | * | |
1927 | * There must be a proc_handler routine for any terminal nodes | |
1928 | * mirrored under /proc/sys (non-terminals are handled by a built-in | |
1929 | * directory handler). Several default handlers are available to | |
1930 | * cover common cases - | |
1931 | * | |
1932 | * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), | |
1933 | * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), | |
1934 | * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() | |
1935 | * | |
1936 | * It is the handler's job to read the input buffer from user memory | |
1937 | * and process it. The handler should return 0 on success. | |
1938 | * | |
1939 | * This routine returns %NULL on a failure to register, and a pointer | |
1940 | * to the table header on success. | |
1941 | */ | |
e51b6ba0 EB |
1942 | struct ctl_table_header *__register_sysctl_paths( |
1943 | struct ctl_table_root *root, | |
1944 | struct nsproxy *namespaces, | |
1945 | const struct ctl_path *path, struct ctl_table *table) | |
1da177e4 | 1946 | { |
29e796fd EB |
1947 | struct ctl_table_header *header; |
1948 | struct ctl_table *new, **prevp; | |
1949 | unsigned int n, npath; | |
ae7edecc | 1950 | struct ctl_table_set *set; |
29e796fd EB |
1951 | |
1952 | /* Count the path components */ | |
1953 | for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath) | |
1954 | ; | |
1955 | ||
1956 | /* | |
1957 | * For each path component, allocate a 2-element ctl_table array. | |
1958 | * The first array element will be filled with the sysctl entry | |
1959 | * for this, the second will be the sentinel (ctl_name == 0). | |
1960 | * | |
1961 | * We allocate everything in one go so that we don't have to | |
1962 | * worry about freeing additional memory in unregister_sysctl_table. | |
1963 | */ | |
1964 | header = kzalloc(sizeof(struct ctl_table_header) + | |
1965 | (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); | |
1966 | if (!header) | |
1da177e4 | 1967 | return NULL; |
29e796fd EB |
1968 | |
1969 | new = (struct ctl_table *) (header + 1); | |
1970 | ||
1971 | /* Now connect the dots */ | |
1972 | prevp = &header->ctl_table; | |
1973 | for (n = 0; n < npath; ++n, ++path) { | |
1974 | /* Copy the procname */ | |
1975 | new->procname = path->procname; | |
1976 | new->ctl_name = path->ctl_name; | |
1977 | new->mode = 0555; | |
1978 | ||
1979 | *prevp = new; | |
1980 | prevp = &new->child; | |
1981 | ||
1982 | new += 2; | |
1983 | } | |
1984 | *prevp = table; | |
23eb06de | 1985 | header->ctl_table_arg = table; |
29e796fd EB |
1986 | |
1987 | INIT_LIST_HEAD(&header->ctl_entry); | |
1988 | header->used = 0; | |
1989 | header->unregistering = NULL; | |
e51b6ba0 | 1990 | header->root = root; |
29e796fd | 1991 | sysctl_set_parent(NULL, header->ctl_table); |
f7e6ced4 | 1992 | header->count = 1; |
88f458e4 | 1993 | #ifdef CONFIG_SYSCTL_SYSCALL_CHECK |
e51b6ba0 | 1994 | if (sysctl_check_table(namespaces, header->ctl_table)) { |
29e796fd | 1995 | kfree(header); |
fc6cd25b EB |
1996 | return NULL; |
1997 | } | |
88f458e4 | 1998 | #endif |
330d57fb | 1999 | spin_lock(&sysctl_lock); |
73455092 | 2000 | header->set = lookup_header_set(root, namespaces); |
ae7edecc AV |
2001 | header->attached_by = header->ctl_table; |
2002 | header->attached_to = root_table; | |
2003 | header->parent = &root_table_header; | |
2004 | for (set = header->set; set; set = set->parent) { | |
2005 | struct ctl_table_header *p; | |
2006 | list_for_each_entry(p, &set->list, ctl_entry) { | |
2007 | if (p->unregistering) | |
2008 | continue; | |
2009 | try_attach(p, header); | |
2010 | } | |
2011 | } | |
2012 | header->parent->count++; | |
73455092 | 2013 | list_add_tail(&header->ctl_entry, &header->set->list); |
330d57fb | 2014 | spin_unlock(&sysctl_lock); |
29e796fd EB |
2015 | |
2016 | return header; | |
2017 | } | |
2018 | ||
e51b6ba0 EB |
2019 | /** |
2020 | * register_sysctl_table_path - register a sysctl table hierarchy | |
2021 | * @path: The path to the directory the sysctl table is in. | |
2022 | * @table: the top-level table structure | |
2023 | * | |
2024 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
2025 | * array. A completely 0 filled entry terminates the table. | |
2026 | * | |
2027 | * See __register_sysctl_paths for more details. | |
2028 | */ | |
2029 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, | |
2030 | struct ctl_table *table) | |
2031 | { | |
2032 | return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, | |
2033 | path, table); | |
2034 | } | |
2035 | ||
29e796fd EB |
2036 | /** |
2037 | * register_sysctl_table - register a sysctl table hierarchy | |
2038 | * @table: the top-level table structure | |
2039 | * | |
2040 | * Register a sysctl table hierarchy. @table should be a filled in ctl_table | |
2041 | * array. A completely 0 filled entry terminates the table. | |
2042 | * | |
2043 | * See register_sysctl_paths for more details. | |
2044 | */ | |
2045 | struct ctl_table_header *register_sysctl_table(struct ctl_table *table) | |
2046 | { | |
2047 | static const struct ctl_path null_path[] = { {} }; | |
2048 | ||
2049 | return register_sysctl_paths(null_path, table); | |
1da177e4 LT |
2050 | } |
2051 | ||
2052 | /** | |
2053 | * unregister_sysctl_table - unregister a sysctl table hierarchy | |
2054 | * @header: the header returned from register_sysctl_table | |
2055 | * | |
2056 | * Unregisters the sysctl table and all children. proc entries may not | |
2057 | * actually be removed until they are no longer used by anyone. | |
2058 | */ | |
2059 | void unregister_sysctl_table(struct ctl_table_header * header) | |
2060 | { | |
330d57fb | 2061 | might_sleep(); |
f1dad166 PE |
2062 | |
2063 | if (header == NULL) | |
2064 | return; | |
2065 | ||
330d57fb AV |
2066 | spin_lock(&sysctl_lock); |
2067 | start_unregistering(header); | |
ae7edecc AV |
2068 | if (!--header->parent->count) { |
2069 | WARN_ON(1); | |
2070 | kfree(header->parent); | |
2071 | } | |
f7e6ced4 AV |
2072 | if (!--header->count) |
2073 | kfree(header); | |
330d57fb | 2074 | spin_unlock(&sysctl_lock); |
1da177e4 LT |
2075 | } |
2076 | ||
9043476f AV |
2077 | int sysctl_is_seen(struct ctl_table_header *p) |
2078 | { | |
2079 | struct ctl_table_set *set = p->set; | |
2080 | int res; | |
2081 | spin_lock(&sysctl_lock); | |
2082 | if (p->unregistering) | |
2083 | res = 0; | |
2084 | else if (!set->is_seen) | |
2085 | res = 1; | |
2086 | else | |
2087 | res = set->is_seen(set); | |
2088 | spin_unlock(&sysctl_lock); | |
2089 | return res; | |
2090 | } | |
2091 | ||
73455092 AV |
2092 | void setup_sysctl_set(struct ctl_table_set *p, |
2093 | struct ctl_table_set *parent, | |
2094 | int (*is_seen)(struct ctl_table_set *)) | |
2095 | { | |
2096 | INIT_LIST_HEAD(&p->list); | |
2097 | p->parent = parent ? parent : &sysctl_table_root.default_set; | |
2098 | p->is_seen = is_seen; | |
2099 | } | |
2100 | ||
b89a8171 | 2101 | #else /* !CONFIG_SYSCTL */ |
d8217f07 | 2102 | struct ctl_table_header *register_sysctl_table(struct ctl_table * table) |
b89a8171 EB |
2103 | { |
2104 | return NULL; | |
2105 | } | |
2106 | ||
29e796fd EB |
2107 | struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, |
2108 | struct ctl_table *table) | |
2109 | { | |
2110 | return NULL; | |
2111 | } | |
2112 | ||
b89a8171 EB |
2113 | void unregister_sysctl_table(struct ctl_table_header * table) |
2114 | { | |
2115 | } | |
2116 | ||
73455092 AV |
2117 | void setup_sysctl_set(struct ctl_table_set *p, |
2118 | struct ctl_table_set *parent, | |
2119 | int (*is_seen)(struct ctl_table_set *)) | |
2120 | { | |
2121 | } | |
2122 | ||
f7e6ced4 AV |
2123 | void sysctl_head_put(struct ctl_table_header *head) |
2124 | { | |
2125 | } | |
2126 | ||
b89a8171 EB |
2127 | #endif /* CONFIG_SYSCTL */ |
2128 | ||
1da177e4 LT |
2129 | /* |
2130 | * /proc/sys support | |
2131 | */ | |
2132 | ||
b89a8171 | 2133 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 2134 | |
b1ba4ddd | 2135 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 2136 | void __user *buffer, |
b1ba4ddd | 2137 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2138 | { |
2139 | size_t len; | |
2140 | char __user *p; | |
2141 | char c; | |
8d060877 ON |
2142 | |
2143 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
2144 | *lenp = 0; |
2145 | return 0; | |
2146 | } | |
8d060877 | 2147 | |
1da177e4 LT |
2148 | if (write) { |
2149 | len = 0; | |
2150 | p = buffer; | |
2151 | while (len < *lenp) { | |
2152 | if (get_user(c, p++)) | |
2153 | return -EFAULT; | |
2154 | if (c == 0 || c == '\n') | |
2155 | break; | |
2156 | len++; | |
2157 | } | |
f5dd3d6f SV |
2158 | if (len >= maxlen) |
2159 | len = maxlen-1; | |
2160 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 2161 | return -EFAULT; |
f5dd3d6f | 2162 | ((char *) data)[len] = 0; |
1da177e4 LT |
2163 | *ppos += *lenp; |
2164 | } else { | |
f5dd3d6f SV |
2165 | len = strlen(data); |
2166 | if (len > maxlen) | |
2167 | len = maxlen; | |
8d060877 ON |
2168 | |
2169 | if (*ppos > len) { | |
2170 | *lenp = 0; | |
2171 | return 0; | |
2172 | } | |
2173 | ||
2174 | data += *ppos; | |
2175 | len -= *ppos; | |
2176 | ||
1da177e4 LT |
2177 | if (len > *lenp) |
2178 | len = *lenp; | |
2179 | if (len) | |
f5dd3d6f | 2180 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
2181 | return -EFAULT; |
2182 | if (len < *lenp) { | |
2183 | if(put_user('\n', ((char __user *) buffer) + len)) | |
2184 | return -EFAULT; | |
2185 | len++; | |
2186 | } | |
2187 | *lenp = len; | |
2188 | *ppos += len; | |
2189 | } | |
2190 | return 0; | |
2191 | } | |
2192 | ||
f5dd3d6f SV |
2193 | /** |
2194 | * proc_dostring - read a string sysctl | |
2195 | * @table: the sysctl table | |
2196 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2197 | * @buffer: the user buffer |
2198 | * @lenp: the size of the user buffer | |
2199 | * @ppos: file position | |
2200 | * | |
2201 | * Reads/writes a string from/to the user buffer. If the kernel | |
2202 | * buffer provided is not large enough to hold the string, the | |
2203 | * string is truncated. The copied string is %NULL-terminated. | |
2204 | * If the string is being read by the user process, it is copied | |
2205 | * and a newline '\n' is added. It is truncated if the buffer is | |
2206 | * not large enough. | |
2207 | * | |
2208 | * Returns 0 on success. | |
2209 | */ | |
8d65af78 | 2210 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2211 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2212 | { | |
8d65af78 | 2213 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
2214 | buffer, lenp, ppos); |
2215 | } | |
2216 | ||
1da177e4 LT |
2217 | |
2218 | static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp, | |
2219 | int *valp, | |
2220 | int write, void *data) | |
2221 | { | |
2222 | if (write) { | |
2223 | *valp = *negp ? -*lvalp : *lvalp; | |
2224 | } else { | |
2225 | int val = *valp; | |
2226 | if (val < 0) { | |
2227 | *negp = -1; | |
2228 | *lvalp = (unsigned long)-val; | |
2229 | } else { | |
2230 | *negp = 0; | |
2231 | *lvalp = (unsigned long)val; | |
2232 | } | |
2233 | } | |
2234 | return 0; | |
2235 | } | |
2236 | ||
d8217f07 | 2237 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2238 | int write, void __user *buffer, |
fcfbd547 | 2239 | size_t *lenp, loff_t *ppos, |
1da177e4 LT |
2240 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, |
2241 | int write, void *data), | |
2242 | void *data) | |
2243 | { | |
2244 | #define TMPBUFLEN 21 | |
7338f299 | 2245 | int *i, vleft, first = 1, neg; |
1da177e4 LT |
2246 | unsigned long lval; |
2247 | size_t left, len; | |
2248 | ||
2249 | char buf[TMPBUFLEN], *p; | |
2250 | char __user *s = buffer; | |
2251 | ||
fcfbd547 | 2252 | if (!tbl_data || !table->maxlen || !*lenp || |
1da177e4 LT |
2253 | (*ppos && !write)) { |
2254 | *lenp = 0; | |
2255 | return 0; | |
2256 | } | |
2257 | ||
fcfbd547 | 2258 | i = (int *) tbl_data; |
1da177e4 LT |
2259 | vleft = table->maxlen / sizeof(*i); |
2260 | left = *lenp; | |
2261 | ||
2262 | if (!conv) | |
2263 | conv = do_proc_dointvec_conv; | |
2264 | ||
2265 | for (; left && vleft--; i++, first=0) { | |
2266 | if (write) { | |
2267 | while (left) { | |
2268 | char c; | |
2269 | if (get_user(c, s)) | |
2270 | return -EFAULT; | |
2271 | if (!isspace(c)) | |
2272 | break; | |
2273 | left--; | |
2274 | s++; | |
2275 | } | |
2276 | if (!left) | |
2277 | break; | |
2278 | neg = 0; | |
2279 | len = left; | |
2280 | if (len > sizeof(buf) - 1) | |
2281 | len = sizeof(buf) - 1; | |
2282 | if (copy_from_user(buf, s, len)) | |
2283 | return -EFAULT; | |
2284 | buf[len] = 0; | |
2285 | p = buf; | |
2286 | if (*p == '-' && left > 1) { | |
2287 | neg = 1; | |
bd9b0bac | 2288 | p++; |
1da177e4 LT |
2289 | } |
2290 | if (*p < '0' || *p > '9') | |
2291 | break; | |
2292 | ||
2293 | lval = simple_strtoul(p, &p, 0); | |
2294 | ||
2295 | len = p-buf; | |
2296 | if ((len < left) && *p && !isspace(*p)) | |
2297 | break; | |
1da177e4 LT |
2298 | s += len; |
2299 | left -= len; | |
2300 | ||
2301 | if (conv(&neg, &lval, i, 1, data)) | |
2302 | break; | |
2303 | } else { | |
2304 | p = buf; | |
2305 | if (!first) | |
2306 | *p++ = '\t'; | |
2307 | ||
2308 | if (conv(&neg, &lval, i, 0, data)) | |
2309 | break; | |
2310 | ||
2311 | sprintf(p, "%s%lu", neg ? "-" : "", lval); | |
2312 | len = strlen(buf); | |
2313 | if (len > left) | |
2314 | len = left; | |
2315 | if(copy_to_user(s, buf, len)) | |
2316 | return -EFAULT; | |
2317 | left -= len; | |
2318 | s += len; | |
2319 | } | |
2320 | } | |
2321 | ||
2322 | if (!write && !first && left) { | |
2323 | if(put_user('\n', s)) | |
2324 | return -EFAULT; | |
2325 | left--, s++; | |
2326 | } | |
2327 | if (write) { | |
2328 | while (left) { | |
2329 | char c; | |
2330 | if (get_user(c, s++)) | |
2331 | return -EFAULT; | |
2332 | if (!isspace(c)) | |
2333 | break; | |
2334 | left--; | |
2335 | } | |
2336 | } | |
2337 | if (write && first) | |
2338 | return -EINVAL; | |
2339 | *lenp -= left; | |
2340 | *ppos += *lenp; | |
2341 | return 0; | |
2342 | #undef TMPBUFLEN | |
2343 | } | |
2344 | ||
8d65af78 | 2345 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 KK |
2346 | void __user *buffer, size_t *lenp, loff_t *ppos, |
2347 | int (*conv)(int *negp, unsigned long *lvalp, int *valp, | |
2348 | int write, void *data), | |
2349 | void *data) | |
2350 | { | |
8d65af78 | 2351 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2352 | buffer, lenp, ppos, conv, data); |
2353 | } | |
2354 | ||
1da177e4 LT |
2355 | /** |
2356 | * proc_dointvec - read a vector of integers | |
2357 | * @table: the sysctl table | |
2358 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2359 | * @buffer: the user buffer |
2360 | * @lenp: the size of the user buffer | |
2361 | * @ppos: file position | |
2362 | * | |
2363 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2364 | * values from/to the user buffer, treated as an ASCII string. | |
2365 | * | |
2366 | * Returns 0 on success. | |
2367 | */ | |
8d65af78 | 2368 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2369 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2370 | { | |
8d65af78 | 2371 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2372 | NULL,NULL); |
2373 | } | |
2374 | ||
34f5a398 | 2375 | /* |
25ddbb18 AK |
2376 | * Taint values can only be increased |
2377 | * This means we can safely use a temporary. | |
34f5a398 | 2378 | */ |
8d65af78 | 2379 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2380 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2381 | { | |
25ddbb18 AK |
2382 | struct ctl_table t; |
2383 | unsigned long tmptaint = get_taint(); | |
2384 | int err; | |
34f5a398 | 2385 | |
91fcd412 | 2386 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2387 | return -EPERM; |
2388 | ||
25ddbb18 AK |
2389 | t = *table; |
2390 | t.data = &tmptaint; | |
8d65af78 | 2391 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2392 | if (err < 0) |
2393 | return err; | |
2394 | ||
2395 | if (write) { | |
2396 | /* | |
2397 | * Poor man's atomic or. Not worth adding a primitive | |
2398 | * to everyone's atomic.h for this | |
2399 | */ | |
2400 | int i; | |
2401 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2402 | if ((tmptaint >> i) & 1) | |
2403 | add_taint(i); | |
2404 | } | |
2405 | } | |
2406 | ||
2407 | return err; | |
34f5a398 TT |
2408 | } |
2409 | ||
1da177e4 LT |
2410 | struct do_proc_dointvec_minmax_conv_param { |
2411 | int *min; | |
2412 | int *max; | |
2413 | }; | |
2414 | ||
2415 | static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, | |
2416 | int *valp, | |
2417 | int write, void *data) | |
2418 | { | |
2419 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2420 | if (write) { | |
2421 | int val = *negp ? -*lvalp : *lvalp; | |
2422 | if ((param->min && *param->min > val) || | |
2423 | (param->max && *param->max < val)) | |
2424 | return -EINVAL; | |
2425 | *valp = val; | |
2426 | } else { | |
2427 | int val = *valp; | |
2428 | if (val < 0) { | |
2429 | *negp = -1; | |
2430 | *lvalp = (unsigned long)-val; | |
2431 | } else { | |
2432 | *negp = 0; | |
2433 | *lvalp = (unsigned long)val; | |
2434 | } | |
2435 | } | |
2436 | return 0; | |
2437 | } | |
2438 | ||
2439 | /** | |
2440 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2441 | * @table: the sysctl table | |
2442 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2443 | * @buffer: the user buffer |
2444 | * @lenp: the size of the user buffer | |
2445 | * @ppos: file position | |
2446 | * | |
2447 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2448 | * values from/to the user buffer, treated as an ASCII string. | |
2449 | * | |
2450 | * This routine will ensure the values are within the range specified by | |
2451 | * table->extra1 (min) and table->extra2 (max). | |
2452 | * | |
2453 | * Returns 0 on success. | |
2454 | */ | |
8d65af78 | 2455 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2456 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2457 | { | |
2458 | struct do_proc_dointvec_minmax_conv_param param = { | |
2459 | .min = (int *) table->extra1, | |
2460 | .max = (int *) table->extra2, | |
2461 | }; | |
8d65af78 | 2462 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2463 | do_proc_dointvec_minmax_conv, ¶m); |
2464 | } | |
2465 | ||
d8217f07 | 2466 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2467 | void __user *buffer, |
2468 | size_t *lenp, loff_t *ppos, | |
2469 | unsigned long convmul, | |
2470 | unsigned long convdiv) | |
2471 | { | |
2472 | #define TMPBUFLEN 21 | |
2473 | unsigned long *i, *min, *max, val; | |
2474 | int vleft, first=1, neg; | |
2475 | size_t len, left; | |
2476 | char buf[TMPBUFLEN], *p; | |
2477 | char __user *s = buffer; | |
2478 | ||
fcfbd547 | 2479 | if (!data || !table->maxlen || !*lenp || |
1da177e4 LT |
2480 | (*ppos && !write)) { |
2481 | *lenp = 0; | |
2482 | return 0; | |
2483 | } | |
2484 | ||
fcfbd547 | 2485 | i = (unsigned long *) data; |
1da177e4 LT |
2486 | min = (unsigned long *) table->extra1; |
2487 | max = (unsigned long *) table->extra2; | |
2488 | vleft = table->maxlen / sizeof(unsigned long); | |
2489 | left = *lenp; | |
2490 | ||
2491 | for (; left && vleft--; i++, min++, max++, first=0) { | |
2492 | if (write) { | |
2493 | while (left) { | |
2494 | char c; | |
2495 | if (get_user(c, s)) | |
2496 | return -EFAULT; | |
2497 | if (!isspace(c)) | |
2498 | break; | |
2499 | left--; | |
2500 | s++; | |
2501 | } | |
2502 | if (!left) | |
2503 | break; | |
2504 | neg = 0; | |
2505 | len = left; | |
2506 | if (len > TMPBUFLEN-1) | |
2507 | len = TMPBUFLEN-1; | |
2508 | if (copy_from_user(buf, s, len)) | |
2509 | return -EFAULT; | |
2510 | buf[len] = 0; | |
2511 | p = buf; | |
2512 | if (*p == '-' && left > 1) { | |
2513 | neg = 1; | |
bd9b0bac | 2514 | p++; |
1da177e4 LT |
2515 | } |
2516 | if (*p < '0' || *p > '9') | |
2517 | break; | |
2518 | val = simple_strtoul(p, &p, 0) * convmul / convdiv ; | |
2519 | len = p-buf; | |
2520 | if ((len < left) && *p && !isspace(*p)) | |
2521 | break; | |
2522 | if (neg) | |
2523 | val = -val; | |
2524 | s += len; | |
2525 | left -= len; | |
2526 | ||
2527 | if(neg) | |
2528 | continue; | |
2529 | if ((min && val < *min) || (max && val > *max)) | |
2530 | continue; | |
2531 | *i = val; | |
2532 | } else { | |
2533 | p = buf; | |
2534 | if (!first) | |
2535 | *p++ = '\t'; | |
2536 | sprintf(p, "%lu", convdiv * (*i) / convmul); | |
2537 | len = strlen(buf); | |
2538 | if (len > left) | |
2539 | len = left; | |
2540 | if(copy_to_user(s, buf, len)) | |
2541 | return -EFAULT; | |
2542 | left -= len; | |
2543 | s += len; | |
2544 | } | |
2545 | } | |
2546 | ||
2547 | if (!write && !first && left) { | |
2548 | if(put_user('\n', s)) | |
2549 | return -EFAULT; | |
2550 | left--, s++; | |
2551 | } | |
2552 | if (write) { | |
2553 | while (left) { | |
2554 | char c; | |
2555 | if (get_user(c, s++)) | |
2556 | return -EFAULT; | |
2557 | if (!isspace(c)) | |
2558 | break; | |
2559 | left--; | |
2560 | } | |
2561 | } | |
2562 | if (write && first) | |
2563 | return -EINVAL; | |
2564 | *lenp -= left; | |
2565 | *ppos += *lenp; | |
2566 | return 0; | |
2567 | #undef TMPBUFLEN | |
2568 | } | |
2569 | ||
d8217f07 | 2570 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2571 | void __user *buffer, |
2572 | size_t *lenp, loff_t *ppos, | |
2573 | unsigned long convmul, | |
2574 | unsigned long convdiv) | |
2575 | { | |
2576 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2577 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2578 | } |
2579 | ||
1da177e4 LT |
2580 | /** |
2581 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2582 | * @table: the sysctl table | |
2583 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2584 | * @buffer: the user buffer |
2585 | * @lenp: the size of the user buffer | |
2586 | * @ppos: file position | |
2587 | * | |
2588 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2589 | * values from/to the user buffer, treated as an ASCII string. | |
2590 | * | |
2591 | * This routine will ensure the values are within the range specified by | |
2592 | * table->extra1 (min) and table->extra2 (max). | |
2593 | * | |
2594 | * Returns 0 on success. | |
2595 | */ | |
8d65af78 | 2596 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2597 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2598 | { | |
8d65af78 | 2599 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2600 | } |
2601 | ||
2602 | /** | |
2603 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2604 | * @table: the sysctl table | |
2605 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2606 | * @buffer: the user buffer |
2607 | * @lenp: the size of the user buffer | |
2608 | * @ppos: file position | |
2609 | * | |
2610 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2611 | * values from/to the user buffer, treated as an ASCII string. The values | |
2612 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2613 | * | |
2614 | * This routine will ensure the values are within the range specified by | |
2615 | * table->extra1 (min) and table->extra2 (max). | |
2616 | * | |
2617 | * Returns 0 on success. | |
2618 | */ | |
d8217f07 | 2619 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2620 | void __user *buffer, |
2621 | size_t *lenp, loff_t *ppos) | |
2622 | { | |
8d65af78 | 2623 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2624 | lenp, ppos, HZ, 1000l); |
2625 | } | |
2626 | ||
2627 | ||
2628 | static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp, | |
2629 | int *valp, | |
2630 | int write, void *data) | |
2631 | { | |
2632 | if (write) { | |
cba9f33d BS |
2633 | if (*lvalp > LONG_MAX / HZ) |
2634 | return 1; | |
1da177e4 LT |
2635 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2636 | } else { | |
2637 | int val = *valp; | |
2638 | unsigned long lval; | |
2639 | if (val < 0) { | |
2640 | *negp = -1; | |
2641 | lval = (unsigned long)-val; | |
2642 | } else { | |
2643 | *negp = 0; | |
2644 | lval = (unsigned long)val; | |
2645 | } | |
2646 | *lvalp = lval / HZ; | |
2647 | } | |
2648 | return 0; | |
2649 | } | |
2650 | ||
2651 | static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp, | |
2652 | int *valp, | |
2653 | int write, void *data) | |
2654 | { | |
2655 | if (write) { | |
cba9f33d BS |
2656 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2657 | return 1; | |
1da177e4 LT |
2658 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2659 | } else { | |
2660 | int val = *valp; | |
2661 | unsigned long lval; | |
2662 | if (val < 0) { | |
2663 | *negp = -1; | |
2664 | lval = (unsigned long)-val; | |
2665 | } else { | |
2666 | *negp = 0; | |
2667 | lval = (unsigned long)val; | |
2668 | } | |
2669 | *lvalp = jiffies_to_clock_t(lval); | |
2670 | } | |
2671 | return 0; | |
2672 | } | |
2673 | ||
2674 | static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp, | |
2675 | int *valp, | |
2676 | int write, void *data) | |
2677 | { | |
2678 | if (write) { | |
2679 | *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); | |
2680 | } else { | |
2681 | int val = *valp; | |
2682 | unsigned long lval; | |
2683 | if (val < 0) { | |
2684 | *negp = -1; | |
2685 | lval = (unsigned long)-val; | |
2686 | } else { | |
2687 | *negp = 0; | |
2688 | lval = (unsigned long)val; | |
2689 | } | |
2690 | *lvalp = jiffies_to_msecs(lval); | |
2691 | } | |
2692 | return 0; | |
2693 | } | |
2694 | ||
2695 | /** | |
2696 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2697 | * @table: the sysctl table | |
2698 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2699 | * @buffer: the user buffer |
2700 | * @lenp: the size of the user buffer | |
2701 | * @ppos: file position | |
2702 | * | |
2703 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2704 | * values from/to the user buffer, treated as an ASCII string. | |
2705 | * The values read are assumed to be in seconds, and are converted into | |
2706 | * jiffies. | |
2707 | * | |
2708 | * Returns 0 on success. | |
2709 | */ | |
8d65af78 | 2710 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2711 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2712 | { | |
8d65af78 | 2713 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2714 | do_proc_dointvec_jiffies_conv,NULL); |
2715 | } | |
2716 | ||
2717 | /** | |
2718 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2719 | * @table: the sysctl table | |
2720 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2721 | * @buffer: the user buffer |
2722 | * @lenp: the size of the user buffer | |
1e5d5331 | 2723 | * @ppos: pointer to the file position |
1da177e4 LT |
2724 | * |
2725 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2726 | * values from/to the user buffer, treated as an ASCII string. | |
2727 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2728 | * are converted into jiffies. | |
2729 | * | |
2730 | * Returns 0 on success. | |
2731 | */ | |
8d65af78 | 2732 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2733 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2734 | { | |
8d65af78 | 2735 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2736 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2737 | } | |
2738 | ||
2739 | /** | |
2740 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2741 | * @table: the sysctl table | |
2742 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2743 | * @buffer: the user buffer |
2744 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2745 | * @ppos: file position |
2746 | * @ppos: the current position in the file | |
1da177e4 LT |
2747 | * |
2748 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2749 | * values from/to the user buffer, treated as an ASCII string. | |
2750 | * The values read are assumed to be in 1/1000 seconds, and | |
2751 | * are converted into jiffies. | |
2752 | * | |
2753 | * Returns 0 on success. | |
2754 | */ | |
8d65af78 | 2755 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2756 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2757 | { | |
8d65af78 | 2758 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2759 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2760 | } | |
2761 | ||
8d65af78 | 2762 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2763 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2764 | { | |
2765 | struct pid *new_pid; | |
2766 | pid_t tmp; | |
2767 | int r; | |
2768 | ||
6c5f3e7b | 2769 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2770 | |
8d65af78 | 2771 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2772 | lenp, ppos, NULL, NULL); |
2773 | if (r || !write) | |
2774 | return r; | |
2775 | ||
2776 | new_pid = find_get_pid(tmp); | |
2777 | if (!new_pid) | |
2778 | return -ESRCH; | |
2779 | ||
2780 | put_pid(xchg(&cad_pid, new_pid)); | |
2781 | return 0; | |
2782 | } | |
2783 | ||
1da177e4 LT |
2784 | #else /* CONFIG_PROC_FS */ |
2785 | ||
8d65af78 | 2786 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2787 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2788 | { | |
2789 | return -ENOSYS; | |
2790 | } | |
2791 | ||
8d65af78 | 2792 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2793 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2794 | { |
2795 | return -ENOSYS; | |
2796 | } | |
2797 | ||
8d65af78 | 2798 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2799 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2800 | { | |
2801 | return -ENOSYS; | |
2802 | } | |
2803 | ||
8d65af78 | 2804 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2805 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2806 | { | |
2807 | return -ENOSYS; | |
2808 | } | |
2809 | ||
8d65af78 | 2810 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2811 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2812 | { | |
2813 | return -ENOSYS; | |
2814 | } | |
2815 | ||
8d65af78 | 2816 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2817 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2818 | { | |
2819 | return -ENOSYS; | |
2820 | } | |
2821 | ||
8d65af78 | 2822 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2823 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2824 | { | |
2825 | return -ENOSYS; | |
2826 | } | |
2827 | ||
d8217f07 | 2828 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2829 | void __user *buffer, |
2830 | size_t *lenp, loff_t *ppos) | |
2831 | { | |
2832 | return -ENOSYS; | |
2833 | } | |
2834 | ||
2835 | ||
2836 | #endif /* CONFIG_PROC_FS */ | |
2837 | ||
f221e726 | 2838 | int sysctl_data(struct ctl_table *table, |
49a0c458 EB |
2839 | void __user *oldval, size_t __user *oldlenp, |
2840 | void __user *newval, size_t newlen) | |
2841 | { | |
2842 | return -ENOSYS; | |
2843 | } | |
2844 | ||
f221e726 | 2845 | int sysctl_string(struct ctl_table *table, |
1da177e4 | 2846 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2847 | void __user *newval, size_t newlen) |
1da177e4 LT |
2848 | { |
2849 | return -ENOSYS; | |
2850 | } | |
2851 | ||
f221e726 | 2852 | int sysctl_intvec(struct ctl_table *table, |
1da177e4 | 2853 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2854 | void __user *newval, size_t newlen) |
1da177e4 LT |
2855 | { |
2856 | return -ENOSYS; | |
2857 | } | |
2858 | ||
f221e726 | 2859 | int sysctl_jiffies(struct ctl_table *table, |
1da177e4 | 2860 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2861 | void __user *newval, size_t newlen) |
1da177e4 LT |
2862 | { |
2863 | return -ENOSYS; | |
2864 | } | |
2865 | ||
f221e726 | 2866 | int sysctl_ms_jiffies(struct ctl_table *table, |
1da177e4 | 2867 | void __user *oldval, size_t __user *oldlenp, |
1f29bcd7 | 2868 | void __user *newval, size_t newlen) |
1da177e4 LT |
2869 | { |
2870 | return -ENOSYS; | |
2871 | } | |
2872 | ||
1da177e4 LT |
2873 | /* |
2874 | * No sense putting this after each symbol definition, twice, | |
2875 | * exception granted :-) | |
2876 | */ | |
2877 | EXPORT_SYMBOL(proc_dointvec); | |
2878 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2879 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2880 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2881 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2882 | EXPORT_SYMBOL(proc_dostring); | |
2883 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2884 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
2885 | EXPORT_SYMBOL(register_sysctl_table); | |
29e796fd | 2886 | EXPORT_SYMBOL(register_sysctl_paths); |
1da177e4 LT |
2887 | EXPORT_SYMBOL(sysctl_intvec); |
2888 | EXPORT_SYMBOL(sysctl_jiffies); | |
2889 | EXPORT_SYMBOL(sysctl_ms_jiffies); | |
2890 | EXPORT_SYMBOL(sysctl_string); | |
49a0c458 | 2891 | EXPORT_SYMBOL(sysctl_data); |
1da177e4 | 2892 | EXPORT_SYMBOL(unregister_sysctl_table); |